87399390 has 32 divisors (see below), whose sum is σ = 225894816. Its totient is φ = 21513600.

The previous prime is 87399383. The next prime is 87399421. The reversal of 87399390 is 9399378.

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 15 ways as a sum of consecutive naturals, for example, 111661 + ... + 112440.

It is an arithmetic number, because the mean of its divisors is an integer number (7059213).

Almost surely, 2^87399390 is an apocalyptic number.

87399390 is an abundant number, since it is smaller than the sum of its proper divisors (138495426).

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

87399390 is a wasteful number, since it uses less digits than its factorization.

87399390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224124.

The product of its (nonzero) digits is 367416, while the sum is 48.

The square root of 87399390 is about 9348.7640894398. The cubic root of 87399390 is about 443.7817793811.

The spelling of 87399390 in words is "eighty-seven million, three hundred ninety-nine thousand, three hundred ninety".