87920904 has 128 divisors (see below), whose sum is σ = 246758400. Its totient is φ = 25977600.

The previous prime is 87920887. The next prime is 87920909. The reversal of 87920904 is 40902978.

It is not an unprimeable number, because it can be changed into a prime (87920909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 870454 + ... + 870554.

It is an arithmetic number, because the mean of its divisors is an integer number (1927800).

Almost surely, 2^87920904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87920904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123379200).

87920904 is an abundant number, since it is smaller than the sum of its proper divisors (158837496).

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

87920904 is a wasteful number, since it uses less digits than its factorization.

87920904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 87920904 is about 9376.6147409393. The cubic root of 87920904 is about 444.6627145846.

The spelling of 87920904 in words is "eighty-seven million, nine hundred twenty thousand, nine hundred four".