87255868 has 18 divisors (see below), whose sum is σ = 177628416. Its totient is φ = 37395288.

The previous prime is 87255863. The next prime is 87255881. The reversal of 87255868 is 86855278.

It is a happy number.

It is a super-2 number, since 2×87255868² = 15227173000866848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87255863) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 222396 + ... + 222787.

Almost surely, 2^87255868 is an apocalyptic number.

It is an amenable number.

87255868 is an abundant number, since it is smaller than the sum of its proper divisors (90372548).

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

87255868 is a wasteful number, since it uses less digits than its factorization.

87255868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445201 (or 445192 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 49.

The square root of 87255868 is about 9341.0849476921. The cubic root of 87255868 is about 443.5387290793.

The spelling of 87255868 in words is "eighty-seven million, two hundred fifty-five thousand, eight hundred sixty-eight".