87188380 has 24 divisors (see below), whose sum is σ = 184268448. Its totient is φ = 34651968.

The previous prime is 87188369. The next prime is 87188389. The reversal of 87188380 is 8388178.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87188389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10744 + ... + 17023.

It is an arithmetic number, because the mean of its divisors is an integer number (7677852).

Almost surely, 2^87188380 is an apocalyptic number.

It is an amenable number.

87188380 is an abundant number, since it is smaller than the sum of its proper divisors (97080068).

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

87188380 is a wasteful number, since it uses less digits than its factorization.

87188380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27933 (or 27931 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 43.

The square root of 87188380 is about 9337.4718205733. The cubic root of 87188380 is about 443.4243479949.

The spelling of 87188380 in words is "eighty-seven million, one hundred eighty-eight thousand, three hundred eighty".