18448416 has 72 divisors (see below), whose sum is σ = 59963904. Its totient is φ = 5270400.

The previous prime is 18448403. The next prime is 18448429. The reversal of 18448416 is 61484481.

It is an interprime number because it is at equal distance from previous prime (18448403) and next prime (18448429).

It is a tau number, because it is divible by the number of its divisors (72).

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 11 ways as a sum of consecutive naturals, for example, 2560 + ... + 6591.

It is an arithmetic number, because the mean of its divisors is an integer number (832832).

Almost surely, 2^18448416 is an apocalyptic number.

18448416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18448416 is an abundant number, since it is smaller than the sum of its proper divisors (41515488).

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

18448416 is a wasteful number, since it uses less digits than its factorization.

18448416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9174 (or 9163 counting only the distinct ones).

The product of its digits is 24576, while the sum is 36.

The square root of 18448416 is about 4295.1619294271. The cubic root of 18448416 is about 264.2325774141.

The spelling of 18448416 in words is "eighteen million, four hundred forty-eight thousand, four hundred sixteen".