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1307901040 = 245139117617
BaseRepresentation
bin100110111110100…
…1111110001110000
310101011001020221021
41031331033301300
510134310313130
6333440505224
744260655365
oct11575176160
93334036837
101307901040
11611304456
1230601b214
1317ac73354
14c59ba46c
1579c5137a
hex4df4fc70

1307901040 has 40 divisors (see below), whose sum is σ = 3062772720. Its totient is φ = 519392256.

The previous prime is 1307900983. The next prime is 1307901041. The reversal of 1307901040 is 401097031.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 1307900996 and 1307901014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1307901041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47689 + ... + 69928.

It is an arithmetic number, because the mean of its divisors is an integer number (76569318).

Almost surely, 21307901040 is an apocalyptic number.

1307901040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1307901040 is an abundant number, since it is smaller than the sum of its proper divisors (1754871680).

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

1307901040 is a wasteful number, since it uses less digits than its factorization.

1307901040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117769 (or 117763 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 1307901040 is about 36164.9144890459. The cubic root of 1307901040 is about 1093.5994799560.

Adding to 1307901040 its reverse (401097031), we get a palindrome (1708998071).

The spelling of 1307901040 in words is "one billion, three hundred seven million, nine hundred one thousand, forty".

Divisors: 1 2 4 5 8 10 16 20 40 80 139 278 556 695 1112 1390 2224 2780 5560 11120 117617 235234 470468 588085 940936 1176170 1881872 2352340 4704680 9409360 16348763 32697526 65395052 81743815 130790104 163487630 261580208 326975260 653950520 1307901040