18649628 has 12 divisors (see below), whose sum is σ = 33519192. Its totient is φ = 9072720.

The previous prime is 18649613. The next prime is 18649637. The reversal of 18649628 is 82694681.

It is a happy number.

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, 62858 + ... + 63153.

It is an arithmetic number, because the mean of its divisors is an integer number (2793266).

Almost surely, 2^18649628 is an apocalyptic number.

It is an amenable number.

18649628 is a deficient number, since it is larger than the sum of its proper divisors (14869564).

18649628 is a wasteful number, since it uses less digits than its factorization.

18649628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126052 (or 126050 counting only the distinct ones).

The product of its digits is 165888, while the sum is 44.

The square root of 18649628 is about 4318.5215062565. The cubic root of 18649628 is about 265.1897442548.

The spelling of 18649628 in words is "eighteen million, six hundred forty-nine thousand, six hundred twenty-eight".