87255870 has 64 divisors (see below), whose sum is σ = 226739520. Its totient is φ = 21362688.

The previous prime is 87255863. The next prime is 87255881. The reversal of 87255870 is 7855278.

It is a happy number.

It is a super-2 number, since 2×87255870² = 15227173698913800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88822 + ... + 89798.

It is an arithmetic number, because the mean of its divisors is an integer number (3542805).

Almost surely, 2^87255870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87255870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113369760).

87255870 is an abundant number, since it is smaller than the sum of its proper divisors (139483650).

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

87255870 is a wasteful number, since it uses less digits than its factorization.

87255870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229.

The product of its (nonzero) digits is 156800, while the sum is 42.

The square root of 87255870 is about 9341.0850547460. The cubic root of 87255870 is about 443.5387324681.

The spelling of 87255870 in words is "eighty-seven million, two hundred fifty-five thousand, eight hundred seventy".