18938448 has 60 divisors (see below), whose sum is σ = 54975648. Its totient is φ = 6311520.

The previous prime is 18938443. The next prime is 18938471. The reversal of 18938448 is 84483981.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18938443) 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, 1453 + ... + 6323.

Almost surely, 2^18938448 is an apocalyptic number.

18938448 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 18938448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27487824).

18938448 is an abundant number, since it is smaller than the sum of its proper divisors (36037200).

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

18938448 is an equidigital number, since it uses as much as digits as its factorization.

18938448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4894 (or 4876 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 18938448 is about 4351.8327173732. The cubic root of 18938448 is about 266.5517032227.

The spelling of 18938448 in words is "eighteen million, nine hundred thirty-eight thousand, four hundred forty-eight".