87578218 has 16 divisors (see below), whose sum is σ = 161683200. Its totient is φ = 34646256.

The previous prime is 87578213. The next prime is 87578219. The reversal of 87578218 is 81287578.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (87578213) 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, 240418 + ... + 240781.

It is an arithmetic number, because the mean of its divisors is an integer number (10105200).

Almost surely, 2^87578218 is an apocalyptic number.

87578218 is a deficient number, since it is larger than the sum of its proper divisors (74104982).

87578218 is a wasteful number, since it uses less digits than its factorization.

87578218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481221.

The product of its digits is 250880, while the sum is 46.

The square root of 87578218 is about 9358.3234609624. The cubic root of 87578218 is about 444.0842473307.

The spelling of 87578218 in words is "eighty-seven million, five hundred seventy-eight thousand, two hundred eighteen".