87231590 has 32 divisors (see below), whose sum is σ = 167565024. Its totient is φ = 32581120.

The previous prime is 87231581. The next prime is 87231611. The reversal of 87231590 is 9513278.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 87231590.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20312 + ... + 24228.

It is an arithmetic number, because the mean of its divisors is an integer number (5236407).

Almost surely, 2^87231590 is an apocalyptic number.

87231590 is a deficient number, since it is larger than the sum of its proper divisors (80333434).

87231590 is a wasteful number, since it uses less digits than its factorization.

87231590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4072.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 87231590 is about 9339.7853294388. The cubic root of 87231590 is about 443.4975886480.

The spelling of 87231590 in words is "eighty-seven million, two hundred thirty-one thousand, five hundred ninety".