18428812 has 24 divisors (see below), whose sum is σ = 33324480. Its totient is φ = 8910720.

The previous prime is 18428807. The next prime is 18428857. The reversal of 18428812 is 21882481.

It is a super-2 number, since 2×18428812² = 679242223462688, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35112 + ... + 35632.

It is an arithmetic number, because the mean of its divisors is an integer number (1388520).

Almost surely, 2^18428812 is an apocalyptic number.

It is an amenable number.

18428812 is a deficient number, since it is larger than the sum of its proper divisors (14895668).

18428812 is a wasteful number, since it uses less digits than its factorization.

18428812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801 (or 799 counting only the distinct ones).

The product of its digits is 8192, while the sum is 34.

The square root of 18428812 is about 4292.8792202903. The cubic root of 18428812 is about 264.1389496584.

The spelling of 18428812 in words is "eighteen million, four hundred twenty-eight thousand, eight hundred twelve".