18344448 has 80 divisors (see below), whose sum is σ = 54341760. Its totient is φ = 6110208.

The previous prime is 18344423. The next prime is 18344453. The reversal of 18344448 is 84444381.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

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, 13161 + ... + 14487.

It is an arithmetic number, because the mean of its divisors is an integer number (679272).

Almost surely, 2^18344448 is an apocalyptic number.

18344448 is a gapful number since it is divisible by the number (18) 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 18344448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27170880).

18344448 is an abundant number, since it is smaller than the sum of its proper divisors (35997312).

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

18344448 is an equidigital number, since it uses as much as digits as its factorization.

18344448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1354 (or 1332 counting only the distinct ones).

The product of its digits is 49152, while the sum is 36.

The square root of 18344448 is about 4283.0419096712. The cubic root of 18344448 is about 263.7352718204.

The spelling of 18344448 in words is "eighteen million, three hundred forty-four thousand, four hundred forty-eight".