87813210 has 32 divisors (see below), whose sum is σ = 216450432. Its totient is φ = 22783680.

The previous prime is 87813203. The next prime is 87813217. The reversal of 87813210 is 1231878.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (87813203) and next prime (87813217).

It is a super-2 number, since 2×87813210² = 15422319701008200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (87813217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38446 + ... + 40665.

It is an arithmetic number, because the mean of its divisors is an integer number (6764076).

Almost surely, 2^87813210 is an apocalyptic number.

87813210 is an abundant number, since it is smaller than the sum of its proper divisors (128637222).

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

87813210 is a wasteful number, since it uses less digits than its factorization.

87813210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79158.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 87813210 is about 9370.8702904266. The cubic root of 87813210 is about 444.4810851505.

The spelling of 87813210 in words is "eighty-seven million, eight hundred thirteen thousand, two hundred ten".