87431208 has 32 divisors (see below), whose sum is σ = 220181760. Its totient is φ = 28929920.

The previous prime is 87431207. The next prime is 87431209. The reversal of 87431208 is 80213478.

It is an interprime number because it is at equal distance from previous prime (87431207) and next prime (87431209).

It is a super-2 number, since 2×87431208² = 15288432264678528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87431203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10008 + ... + 16583.

It is an arithmetic number, because the mean of its divisors is an integer number (6880680).

Almost surely, 2^87431208 is an apocalyptic number.

It is an amenable number.

87431208 is an abundant number, since it is smaller than the sum of its proper divisors (132750552).

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

87431208 is a wasteful number, since it uses less digits than its factorization.

87431208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26737 (or 26733 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 87431208 is about 9350.4656568537. The cubic root of 87431208 is about 443.8356261929.

The spelling of 87431208 in words is "eighty-seven million, four hundred thirty-one thousand, two hundred eight".