87809320 has 16 divisors (see below), whose sum is σ = 197571060. Its totient is φ = 35123712.

The previous prime is 87809297. The next prime is 87809341. The reversal of 87809320 is 2390878.

It can be written as a sum of positive squares in 2 ways, for example, as 86155524 + 1653796 = 9282^2 + 1286^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 87809320.

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, 1097577 + ... + 1097656.

Almost surely, 2^87809320 is an apocalyptic number.

It is an amenable number.

87809320 is an abundant number, since it is smaller than the sum of its proper divisors (109761740).

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

87809320 is a wasteful number, since it uses less digits than its factorization.

87809320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2195244 (or 2195240 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 87809320 is about 9370.6627300314. The cubic root of 87809320 is about 444.4745217608.

The spelling of 87809320 in words is "eighty-seven million, eight hundred nine thousand, three hundred twenty".