18828918 has 12 divisors (see below), whose sum is σ = 40796028. Its totient is φ = 6276300.

The previous prime is 18828907. The next prime is 18828923. The reversal of 18828918 is 81982881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 523008 + ... + 523043.

It is an arithmetic number, because the mean of its divisors is an integer number (3399669).

Almost surely, 2^18828918 is an apocalyptic number.

18828918 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18828918 is an abundant number, since it is smaller than the sum of its proper divisors (21967110).

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

18828918 is a wasteful number, since it uses less digits than its factorization.

18828918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046059 (or 1046056 counting only the distinct ones).

The product of its digits is 73728, while the sum is 45.

The square root of 18828918 is about 4339.2301160459. The cubic root of 18828918 is about 266.0368445392.

The spelling of 18828918 in words is "eighteen million, eight hundred twenty-eight thousand, nine hundred eighteen".