87920656 has 30 divisors (see below), whose sum is σ = 172193406. Its totient is φ = 43488000.

The previous prime is 87920647. The next prime is 87920659. The reversal of 87920656 is 65602978.

It can be written as a sum of positive squares in only one way, i.e., 82083600 + 5837056 = 9060^2 + 2416^2 .

It is not an unprimeable number, because it can be changed into a prime (87920659) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 364696 + ... + 364936.

Almost surely, 2^87920656 is an apocalyptic number.

It is an amenable number.

87920656 is a deficient number, since it is larger than the sum of its proper divisors (84272750).

87920656 is a wasteful number, since it uses less digits than its factorization.

87920656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551 (or 394 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 87920656 is about 9376.6015165411. The cubic root of 87920656 is about 444.6622964949.

The spelling of 87920656 in words is "eighty-seven million, nine hundred twenty thousand, six hundred fifty-six".