18672828 has 12 divisors (see below), whose sum is σ = 43569960. Its totient is φ = 6224272.

The previous prime is 18672809. The next prime is 18672859. The reversal of 18672828 is 82827681.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 18672828.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 778023 + ... + 778046.

It is an arithmetic number, because the mean of its divisors is an integer number (3630830).

Almost surely, 2^18672828 is an apocalyptic number.

It is an amenable number.

18672828 is an abundant number, since it is smaller than the sum of its proper divisors (24897132).

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

18672828 is a wasteful number, since it uses less digits than its factorization.

18672828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556076 (or 1556074 counting only the distinct ones).

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

The square root of 18672828 is about 4321.2067758903. The cubic root of 18672828 is about 265.2996633847.

The spelling of 18672828 in words is "eighteen million, six hundred seventy-two thousand, eight hundred twenty-eight".