87290392 has 16 divisors (see below), whose sum is σ = 187050960. Its totient is φ = 37410144.

The previous prime is 87290383. The next prime is 87290419. The reversal of 87290392 is 29309278.

It is a super-2 number, since 2×87290392² = 15239225071027328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 779323 + ... + 779434.

It is an arithmetic number, because the mean of its divisors is an integer number (11690685).

Almost surely, 2^87290392 is an apocalyptic number.

It is an amenable number.

87290392 is an abundant number, since it is smaller than the sum of its proper divisors (99760568).

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

87290392 is a wasteful number, since it uses less digits than its factorization.

87290392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558770 (or 1558766 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 87290392 is about 9342.9327301442. The cubic root of 87290392 is about 443.5972187921.

The spelling of 87290392 in words is "eighty-seven million, two hundred ninety thousand, three hundred ninety-two".