7956857628 has 36 divisors (see below), whose sum is σ = 20193322968. Its totient is φ = 2641716000.

The previous prime is 7956857609. The next prime is 7956857641. The reversal of 7956857628 is 8267586597.

7956857628 is a `hidden beast` number, since 7 + 9 + 56 + 8 + 576 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 431251 + ... + 449322.

It is an arithmetic number, because the mean of its divisors is an integer number (560925638).

Almost surely, 2^7956857628 is an apocalyptic number.

It is an amenable number.

7956857628 is an abundant number, since it is smaller than the sum of its proper divisors (12236465340).

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

7956857628 is a wasteful number, since it uses less digits than its factorization.

7956857628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880834 (or 880829 counting only the distinct ones).

The product of its digits is 50803200, while the sum is 63.

The square root of 7956857628 is about 89201.2198795510. The cubic root of 7956857628 is about 1996.3983201780.

The spelling of 7956857628 in words is "seven billion, nine hundred fifty-six million, eight hundred fifty-seven thousand, six hundred twenty-eight".