18038448 has 90 divisors (see below), whose sum is σ = 53432964. Its totient is φ = 5679936.

The previous prime is 18038443. The next prime is 18038453. The reversal of 18038448 is 84483081.

18038448 is a `hidden beast` number, since 180 + 38 + 448 = 666.

It is an interprime number because it is at equal distance from previous prime (18038443) and next prime (18038453).

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

It is not an unprimeable number, because it can be changed into a prime (18038441) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 51811 + ... + 52157.

Almost surely, 2^18038448 is an apocalyptic number.

18038448 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 18038448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26716482).

18038448 is an abundant number, since it is smaller than the sum of its proper divisors (35394516).

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

18038448 is a wasteful number, since it uses less digits than its factorization.

18038448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 371 counting only the distinct ones).

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

The square root of 18038448 is about 4247.1694103250. The cubic root of 18038448 is about 262.2606035087.

The spelling of 18038448 in words is "eighteen million, thirty-eight thousand, four hundred forty-eight".