18231456 has 72 divisors (see below), whose sum is σ = 50168160. Its totient is φ = 5796736.

The previous prime is 18231443. The next prime is 18231457. The reversal of 18231456 is 65413281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18231457) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50605 + ... + 50963.

It is an arithmetic number, because the mean of its divisors is an integer number (696780).

Almost surely, 2^18231456 is an apocalyptic number.

18231456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18231456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25084080).

18231456 is an abundant number, since it is smaller than the sum of its proper divisors (31936704).

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

18231456 is a wasteful number, since it uses less digits than its factorization.

18231456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418 (or 387 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 18231456 is about 4269.8309100010. The cubic root of 18231456 is about 263.1926667765.

The spelling of 18231456 in words is "eighteen million, two hundred thirty-one thousand, four hundred fifty-six".