7903985256 has 144 divisors (see below), whose sum is σ = 22916144160. Its totient is φ = 2460265920.

The previous prime is 7903985249. The next prime is 7903985267. The reversal of 7903985256 is 6525893097.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1843291 + ... + 1847573.

It is an arithmetic number, because the mean of its divisors is an integer number (159139890).

Almost surely, 2^7903985256 is an apocalyptic number.

7903985256 is a gapful number since it is divisible by the number (76) 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 7903985256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11458072080).

7903985256 is an abundant number, since it is smaller than the sum of its proper divisors (15012158904).

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

7903985256 is a wasteful number, since it uses less digits than its factorization.

7903985256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4404 (or 4378 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 54.

The square root of 7903985256 is about 88904.3601630426. The cubic root of 7903985256 is about 1991.9665463487.

The spelling of 7903985256 in words is "seven billion, nine hundred three million, nine hundred eighty-five thousand, two hundred fifty-six".