87440180 has 24 divisors (see below), whose sum is σ = 194426568. Its totient is φ = 32918528.

The previous prime is 87440179. The next prime is 87440201. The reversal of 87440180 is 8104478.

It can be written as a sum of positive squares in 4 ways, for example, as 8976016 + 78464164 = 2996^2 + 8858^2 .

It is a congruent number.

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, 128249 + ... + 128928.

It is an arithmetic number, because the mean of its divisors is an integer number (8101107).

Almost surely, 2^87440180 is an apocalyptic number.

It is an amenable number.

87440180 is an abundant number, since it is smaller than the sum of its proper divisors (106986388).

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

87440180 is a wasteful number, since it uses less digits than its factorization.

87440180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257203 (or 257201 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 87440180 is about 9350.9454067490. The cubic root of 87440180 is about 443.8508074884.

The spelling of 87440180 in words is "eighty-seven million, four hundred forty thousand, one hundred eighty".