7900056128 has 28 divisors (see below), whose sum is σ = 16598833452. Its totient is φ = 3717672960.

The previous prime is 7900056121. The next prime is 7900056133. The reversal of 7900056128 is 8216500097.

It can be written as a sum of positive squares in 2 ways, for example, as 7223640064 + 676416064 = 84992^2 + 26008^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7900056091 and 7900056100.

It is not an unprimeable number, because it can be changed into a prime (7900056121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3629453 + ... + 3631628.

Almost surely, 2^7900056128 is an apocalyptic number.

It is an amenable number.

7900056128 is an abundant number, since it is smaller than the sum of its proper divisors (8698777324).

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

7900056128 is a wasteful number, since it uses less digits than its factorization.

7900056128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7261110 (or 7261100 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 7900056128 is about 88882.2599172636. The cubic root of 7900056128 is about 1991.6364180004.

The spelling of 7900056128 in words is "seven billion, nine hundred million, fifty-six thousand, one hundred twenty-eight".