87880440 has 64 divisors (see below), whose sum is σ = 272743200. Its totient is φ = 22625792.

The previous prime is 87880423. The next prime is 87880451. The reversal of 87880440 is 4408878.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9147 + ... + 16106.

Almost surely, 2^87880440 is an apocalyptic number.

It is an amenable number.

87880440 is an abundant number, since it is smaller than the sum of its proper divisors (184862760).

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

87880440 is a wasteful number, since it uses less digits than its factorization.

87880440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25296 (or 25292 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 39.

The square root of 87880440 is about 9374.4567842622. The cubic root of 87880440 is about 444.5944881361.

It can be divided in two parts, 878 and 80440, that added together give a palindrome (81318).

The spelling of 87880440 in words is "eighty-seven million, eight hundred eighty thousand, four hundred forty".