87172488 has 48 divisors (see below), whose sum is σ = 254255820. Its totient is φ = 26822016.

The previous prime is 87172483. The next prime is 87172489. The reversal of 87172488 is 88427178.

It can be written as a sum of positive squares in 2 ways, for example, as 76003524 + 11168964 = 8718^2 + 3342^2 .

It is a super-2 number, since 2×87172488² = 15198085328220288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87172483) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45631 + ... + 47502.

Almost surely, 2^87172488 is an apocalyptic number.

It is an amenable number.

87172488 is an abundant number, since it is smaller than the sum of its proper divisors (167083332).

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

87172488 is a wasteful number, since it uses less digits than its factorization.

87172488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93158 (or 93151 counting only the distinct ones).

The product of its digits is 200704, while the sum is 45.

The square root of 87172488 is about 9336.6208019818. The cubic root of 87172488 is about 443.3974050776.

The spelling of 87172488 in words is "eighty-seven million, one hundred seventy-two thousand, four hundred eighty-eight".