18239748 has 24 divisors (see below), whose sum is σ = 43074528. Its totient is φ = 6006336.

The previous prime is 18239747. The next prime is 18239761. The reversal of 18239748 is 84793281.

It is not an unprimeable number, because it can be changed into a prime (18239747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8161 + ... + 10152.

It is an arithmetic number, because the mean of its divisors is an integer number (1794772).

Almost surely, 2^18239748 is an apocalyptic number.

It is an amenable number.

18239748 is an abundant number, since it is smaller than the sum of its proper divisors (24834780).

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

18239748 is a wasteful number, since it uses less digits than its factorization.

18239748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18403 (or 18401 counting only the distinct ones).

The product of its digits is 96768, while the sum is 42.

The square root of 18239748 is about 4270.8017982576. The cubic root of 18239748 is about 263.2325623433.

The spelling of 18239748 in words is "eighteen million, two hundred thirty-nine thousand, seven hundred forty-eight".