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80615028 = 223132127313
BaseRepresentation
bin1001100111000…
…01011001110100
312121200200000210
410303201121310
5131114140103
611555505420
71666134144
oct463413164
9177620023
1080615028
114156129a
1222bb8270
1313917300
14a9c6924
157125e03
hex4ce1674

80615028 has 72 divisors (see below), whose sum is σ = 205943808. Its totient is φ = 24530688.

The previous prime is 80615027. The next prime is 80615053. The reversal of 80615028 is 82051608.

It is a junction number, because it is equal to n+sod(n) for n = 80614986 and 80615004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80615021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 257400 + ... + 257712.

Almost surely, 280615028 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80615028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102971904).

80615028 is an abundant number, since it is smaller than the sum of its proper divisors (125328780).

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

80615028 is a wasteful number, since it uses less digits than its factorization.

80615028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473 (or 458 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 80615028 is about 8978.5871939855. The cubic root of 80615028 is about 431.9883184427.

The spelling of 80615028 in words is "eighty million, six hundred fifteen thousand, twenty-eight".

Divisors: 1 2 3 4 6 12 13 26 39 52 78 127 156 169 254 313 338 381 507 508 626 676 762 939 1014 1252 1524 1651 1878 2028 3302 3756 4069 4953 6604 8138 9906 12207 16276 19812 21463 24414 39751 42926 48828 52897 64389 79502 85852 105794 119253 128778 158691 159004 211588 238506 257556 317382 477012 516763 634764 1033526 1550289 2067052 3100578 6201156 6717919 13435838 20153757 26871676 40307514 80615028