18404928 has 56 divisors (see below), whose sum is σ = 54112160. Its totient is φ = 6134400.

The previous prime is 18404923. The next prime is 18404983. The reversal of 18404928 is 82940481.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 18404892 and 18404901.

It is not an unprimeable number, because it can be changed into a prime (18404921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3598 + ... + 7053.

Almost surely, 2^18404928 is an apocalyptic number.

18404928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18404928 is an abundant number, since it is smaller than the sum of its proper divisors (35707232).

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

18404928 is a wasteful number, since it uses less digits than its factorization.

18404928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10672 (or 10656 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 18404928 is about 4290.0965024111. The cubic root of 18404928 is about 264.0247910603.

The spelling of 18404928 in words is "eighteen million, four hundred four thousand, nine hundred twenty-eight".