18106728 has 32 divisors (see below), whose sum is σ = 46728960. Its totient is φ = 5840640.

The previous prime is 18106667. The next prime is 18106733. The reversal of 18106728 is 82760181.

It is a happy 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, 11425 + ... + 12912.

It is an arithmetic number, because the mean of its divisors is an integer number (1460280).

Almost surely, 2^18106728 is an apocalyptic number.

It is an amenable number.

18106728 is an abundant number, since it is smaller than the sum of its proper divisors (28622232).

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

18106728 is a wasteful number, since it uses less digits than its factorization.

18106728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24377 (or 24373 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 18106728 is about 4255.2001128032. The cubic root of 18106728 is about 262.5910940080.

The spelling of 18106728 in words is "eighteen million, one hundred six thousand, seven hundred twenty-eight".