87818406 has 32 divisors (see below), whose sum is σ = 192258528. Its totient is φ = 26576640.

The previous prime is 87818377. The next prime is 87818417. The reversal of 87818406 is 60481878.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4471 + ... + 13986.

It is an arithmetic number, because the mean of its divisors is an integer number (6008079).

Almost surely, 2^87818406 is an apocalyptic number.

87818406 is an abundant number, since it is smaller than the sum of its proper divisors (104440122).

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

87818406 is a wasteful number, since it uses less digits than its factorization.

87818406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18536.

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 87818406 is about 9371.1475284514. The cubic root of 87818406 is about 444.4898517820.

The spelling of 87818406 in words is "eighty-seven million, eight hundred eighteen thousand, four hundred six".