87220524 has 24 divisors (see below), whose sum is σ = 203681520. Its totient is φ = 29049664.

The previous prime is 87220517. The next prime is 87220541. The reversal of 87220524 is 42502278.

It is a junction number, because it is equal to n+sod(n) for n = 87220491 and 87220500.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18382 + ... + 22634.

It is an arithmetic number, because the mean of its divisors is an integer number (8486730).

Almost surely, 2^87220524 is an apocalyptic number.

It is an amenable number.

87220524 is an abundant number, since it is smaller than the sum of its proper divisors (116460996).

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

87220524 is a wasteful number, since it uses less digits than its factorization.

87220524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5969 (or 5967 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 87220524 is about 9339.1928987467. The cubic root of 87220524 is about 443.4788341584.

The spelling of 87220524 in words is "eighty-seven million, two hundred twenty thousand, five hundred twenty-four".