87180904 has 8 divisors (see below), whose sum is σ = 163464210. Its totient is φ = 43590448.

The previous prime is 87180881. The next prime is 87180941. The reversal of 87180904 is 40908178.

It can be written as a sum of positive squares in only one way, i.e., 64160100 + 23020804 = 8010^2 + 4798^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5448799 + ... + 5448814.

Almost surely, 2^87180904 is an apocalyptic number.

It is an amenable number.

87180904 is a deficient number, since it is larger than the sum of its proper divisors (76283306).

87180904 is a wasteful number, since it uses less digits than its factorization.

87180904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10897619 (or 10897615 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 87180904 is about 9337.0714894982. The cubic root of 87180904 is about 443.4116737708.

The spelling of 87180904 in words is "eighty-seven million, one hundred eighty thousand, nine hundred four".