87990224 has 20 divisors (see below), whose sum is σ = 194835744. Its totient is φ = 37710048.

The previous prime is 87990173. The next prime is 87990233. The reversal of 87990224 is 42209978.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392702 + ... + 392925.

Almost surely, 2^87990224 is an apocalyptic number.

It is an amenable number.

87990224 is an abundant number, since it is smaller than the sum of its proper divisors (106845520).

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

87990224 is a wasteful number, since it uses less digits than its factorization.

87990224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785642 (or 785636 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 87990224 is about 9380.3104426240. The cubic root of 87990224 is about 444.7795465726.

The spelling of 87990224 in words is "eighty-seven million, nine hundred ninety thousand, two hundred twenty-four".