18728896 has 28 divisors (see below), whose sum is σ = 38450520. Its totient is φ = 9040640.

The previous prime is 18728873. The next prime is 18728903. The reversal of 18728896 is 69882781.

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, 3190 + ... + 6901.

Almost surely, 2^18728896 is an apocalyptic number.

18728896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18728896 is an abundant number, since it is smaller than the sum of its proper divisors (19721624).

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

18728896 is a wasteful number, since it uses less digits than its factorization.

18728896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10132 (or 10122 counting only the distinct ones).

The product of its digits is 387072, while the sum is 49.

The square root of 18728896 is about 4327.6894528143. The cubic root of 18728896 is about 265.5649322260.

The spelling of 18728896 in words is "eighteen million, seven hundred twenty-eight thousand, eight hundred ninety-six".