18489456 has 30 divisors (see below), whose sum is σ = 51745200. Its totient is φ = 6163104.

The previous prime is 18489433. The next prime is 18489463. The reversal of 18489456 is 65498481.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64056 + ... + 64343.

It is an arithmetic number, because the mean of its divisors is an integer number (1724840).

Almost surely, 2^18489456 is an apocalyptic number.

18489456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18489456 is an abundant number, since it is smaller than the sum of its proper divisors (33255744).

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

18489456 is a wasteful number, since it uses less digits than its factorization.

18489456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128413 (or 128404 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 18489456 is about 4299.9367437208. The cubic root of 18489456 is about 264.4283679127.

The spelling of 18489456 in words is "eighteen million, four hundred eighty-nine thousand, four hundred fifty-six".