18107928 has 32 divisors (see below), whose sum is σ = 50300400. Its totient is φ = 6035904.

The previous prime is 18107917. The next prime is 18107933. The reversal of 18107928 is 82970181.

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 = 18107892 and 18107901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41701 + ... + 42132.

Almost surely, 2^18107928 is an apocalyptic number.

18107928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18107928 is an abundant number, since it is smaller than the sum of its proper divisors (32192472).

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

18107928 is a wasteful number, since it uses less digits than its factorization.

18107928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83848 (or 83838 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 18107928 is about 4255.3411144114. The cubic root of 18107928 is about 262.5968948417.

The spelling of 18107928 in words is "eighteen million, one hundred seven thousand, nine hundred twenty-eight".