87135732 has 36 divisors (see below), whose sum is σ = 221384800. Its totient is φ = 28896912.

The previous prime is 87135721. The next prime is 87135739. The reversal of 87135732 is 23753178.

87135732 is a `hidden beast` number, since 87 + 1 + 3 + 573 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87135739) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1083 + ... + 13245.

Almost surely, 2^87135732 is an apocalyptic number.

It is an amenable number.

87135732 is an abundant number, since it is smaller than the sum of its proper divisors (134249068).

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

87135732 is a wasteful number, since it uses less digits than its factorization.

87135732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12372 (or 12367 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 87135732 is about 9334.6522163389. The cubic root of 87135732 is about 443.3350772854.

The spelling of 87135732 in words is "eighty-seven million, one hundred thirty-five thousand, seven hundred thirty-two".