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2028011072620 = 2251331661380657
BaseRepresentation
bin11101100000101110111…
…000010010110001101100
321011212122120121202220011
4131200232320102301230
5231211331313310440
64151353323303004
7266343001456561
oct35405670226154
97155576552804
102028011072620
11712090420285
1228906097aa64
1311931885ac60
1470228ac2868
1537b471ce9ea
hex1d82ee12c6c

2028011072620 has 96 divisors (see below), whose sum is σ = 4741549134336. Its totient is φ = 723550924800.

The previous prime is 2028011072599. The next prime is 2028011072657. The reversal of 2028011072620 is 262701108202.

It is a happy number.

It is a super-2 number, since 2×20280110726202 (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5137332 + ... + 5517988.

It is an arithmetic number, because the mean of its divisors is an integer number (49391136816).

Almost surely, 22028011072620 is an apocalyptic number.

2028011072620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2028011072620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2370774567168).

2028011072620 is an abundant number, since it is smaller than the sum of its proper divisors (2713538061716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2028011072620 is a wasteful number, since it uses less digits than its factorization.

2028011072620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381371 (or 381369 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The spelling of 2028011072620 in words is "two trillion, twenty-eight billion, eleven million, seventy-two thousand, six hundred twenty".

Divisors: 1 2 4 5 10 13 20 26 31 52 62 65 124 130 155 260 310 403 620 661 806 1322 1612 2015 2644 3305 4030 6610 8060 8593 13220 17186 20491 34372 40982 42965 81964 85930 102455 171860 204910 266383 380657 409820 532766 761314 1065532 1331915 1522628 1903285 2663830 3806570 4948541 5327660 7613140 9897082 11800367 19794164 23600734 24742705 47201468 49485410 59001835 98970820 118003670 153404771 236007340 251614277 306809542 503228554 613619084 767023855 1006457108 1258071385 1534047710 2516142770 3068095420 3270985601 5032285540 6541971202 7800042587 13083942404 15600085174 16354928005 31200170348 32709856010 39000212935 65419712020 78000425870 101400553631 156000851740 202801107262 405602214524 507002768155 1014005536310 2028011072620