18453728 has 24 divisors (see below), whose sum is σ = 37911888. Its totient is φ = 8825344.

The previous prime is 18453727. The next prime is 18453733. The reversal of 18453728 is 82735481.

It is a junction number, because it is equal to n+sod(n) for n = 18453691 and 18453700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18453727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11801 + ... + 13272.

It is an arithmetic number, because the mean of its divisors is an integer number (1579662).

Almost surely, 2^18453728 is an apocalyptic number.

It is an amenable number.

18453728 is an abundant number, since it is smaller than the sum of its proper divisors (19458160).

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

18453728 is a wasteful number, since it uses less digits than its factorization.

18453728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25106 (or 25098 counting only the distinct ones).

The product of its digits is 53760, while the sum is 38.

The square root of 18453728 is about 4295.7802550875. The cubic root of 18453728 is about 264.2579358469.

The spelling of 18453728 in words is "eighteen million, four hundred fifty-three thousand, seven hundred twenty-eight".