18628806 has 16 divisors (see below), whose sum is σ = 42580224. Its totient is φ = 5322504.

The previous prime is 18628783. The next prime is 18628823. The reversal of 18628806 is 60882681.

It is a congruent number.

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, 221730 + ... + 221813.

It is an arithmetic number, because the mean of its divisors is an integer number (2661264).

Almost surely, 2^18628806 is an apocalyptic number.

18628806 is an abundant number, since it is smaller than the sum of its proper divisors (23951418).

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

18628806 is a wasteful number, since it uses less digits than its factorization.

18628806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443555.

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 18628806 is about 4316.1100542039. The cubic root of 18628806 is about 265.0910141868.

The spelling of 18628806 in words is "eighteen million, six hundred twenty-eight thousand, eight hundred six".