87940880 has 20 divisors (see below), whose sum is σ = 204462732. Its totient is φ = 35176320.

The previous prime is 87940877. The next prime is 87940903. The reversal of 87940880 is 8804978.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 40551424 + 47389456 = 6368^2 + 6884^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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, 549551 + ... + 549710.

Almost surely, 2^87940880 is an apocalyptic number.

87940880 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87940880 is an abundant number, since it is smaller than the sum of its proper divisors (116521852).

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

87940880 is a wasteful number, since it uses less digits than its factorization.

87940880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099274 (or 1099268 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 87940880 is about 9377.6798836386. The cubic root of 87940880 is about 444.6963884488.

The spelling of 87940880 in words is "eighty-seven million, nine hundred forty thousand, eight hundred eighty".