87866590 has 16 divisors (see below), whose sum is σ = 180754272. Its totient is φ = 30125664.

The previous prime is 87866573. The next prime is 87866609. The reversal of 87866590 is 9566878.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 627549 + ... + 627688.

It is an arithmetic number, because the mean of its divisors is an integer number (11297142).

Almost surely, 2^87866590 is an apocalyptic number.

87866590 is an abundant number, since it is smaller than the sum of its proper divisors (92887682).

87866590 is a wasteful number, since it uses less digits than its factorization.

87866590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255251.

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 87866590 is about 9373.7180456850. The cubic root of 87866590 is about 444.5711308066.

It can be divided in two parts, 8786 and 6590, that added together give a square (15376 = 124²).

The spelling of 87866590 in words is "eighty-seven million, eight hundred sixty-six thousand, five hundred ninety".