87240612 has 24 divisors (see below), whose sum is σ = 204220576. Its totient is φ = 28986048.

The previous prime is 87240563. The next prime is 87240667. The reversal of 87240612 is 21604278.

It is a super-2 number, since 2×87240612² = 15221848764269088, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 87240612.

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, 7858 + ... + 15369.

Almost surely, 2^87240612 is an apocalyptic number.

It is an amenable number.

87240612 is an abundant number, since it is smaller than the sum of its proper divisors (116979964).

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

87240612 is a wasteful number, since it uses less digits than its factorization.

87240612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23547 (or 23545 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 87240612 is about 9340.2683044975. The cubic root of 87240612 is about 443.5128778237.

The spelling of 87240612 in words is "eighty-seven million, two hundred forty thousand, six hundred twelve".