18448728 has 32 divisors (see below), whose sum is σ = 46278960. Its totient is φ = 6128640.

The previous prime is 18448709. The next prime is 18448739. The reversal of 18448728 is 82784481.

It is a self number, because there is not a number n which added to its sum of digits gives 18448728.

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, 6948 + ... + 9228.

Almost surely, 2^18448728 is an apocalyptic number.

It is an amenable number.

18448728 is an abundant number, since it is smaller than the sum of its proper divisors (27830232).

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

18448728 is a wasteful number, since it uses less digits than its factorization.

18448728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2627 (or 2623 counting only the distinct ones).

The product of its digits is 114688, while the sum is 42.

The square root of 18448728 is about 4295.1982492081. The cubic root of 18448728 is about 264.2340669747.

The spelling of 18448728 in words is "eighteen million, four hundred forty-eight thousand, seven hundred twenty-eight".