87172396 has 24 divisors (see below), whose sum is σ = 165470256. Its totient is φ = 40020480.

The previous prime is 87172391. The next prime is 87172417. The reversal of 87172396 is 69327178.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (87172391) 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 7 ways as a sum of consecutive naturals, for example, 12846 + ... + 18421.

It is an arithmetic number, because the mean of its divisors is an integer number (6894594).

Almost surely, 2^87172396 is an apocalyptic number.

It is an amenable number.

87172396 is a deficient number, since it is larger than the sum of its proper divisors (78297860).

87172396 is a wasteful number, since it uses less digits than its factorization.

87172396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31329 (or 31327 counting only the distinct ones).

The product of its digits is 127008, while the sum is 43.

The square root of 87172396 is about 9336.6158751445. The cubic root of 87172396 is about 443.3972490934.

The spelling of 87172396 in words is "eighty-seven million, one hundred seventy-two thousand, three hundred ninety-six".