87540624 has 30 divisors (see below), whose sum is σ = 244992566. Its totient is φ = 29180160.

The previous prime is 87540623. The next prime is 87540641. The reversal of 87540624 is 42604578.

It can be written as a sum of positive squares in only one way, i.e., 72795024 + 14745600 = 8532^2 + 3840^2 .

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

It is not an unprimeable number, because it can be changed into a prime (87540623) 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 5 ways as a sum of consecutive naturals, for example, 303817 + ... + 304104.

Almost surely, 2^87540624 is an apocalyptic number.

It is an amenable number.

87540624 is an abundant number, since it is smaller than the sum of its proper divisors (157451942).

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

87540624 is a wasteful number, since it uses less digits than its factorization.

87540624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607935 (or 607926 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 87540624 is about 9356.3146590952. The cubic root of 87540624 is about 444.0206954074.

The spelling of 87540624 in words is "eighty-seven million, five hundred forty thousand, six hundred twenty-four".