87645918 has 32 divisors (see below), whose sum is σ = 178675200. Its totient is φ = 28656576.

The previous prime is 87645907. The next prime is 87645953. The reversal of 87645918 is 81954678.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84330 + ... + 85362.

It is an arithmetic number, because the mean of its divisors is an integer number (5583600).

Almost surely, 2^87645918 is an apocalyptic number.

87645918 is an abundant number, since it is smaller than the sum of its proper divisors (91029282).

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

87645918 is a wasteful number, since it uses less digits than its factorization.

87645918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296.

The product of its digits is 483840, while the sum is 48.

The square root of 87645918 is about 9361.9398630839. The cubic root of 87645918 is about 444.1986470095.

The spelling of 87645918 in words is "eighty-seven million, six hundred forty-five thousand, nine hundred eighteen".