18139296 has 48 divisors (see below), whose sum is σ = 54419904. Its totient is φ = 5182464.

The previous prime is 18139279. The next prime is 18139307. The reversal of 18139296 is 69293181.

It is a tau number, because it is divible by the number of its divisors (48).

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, 12825 + ... + 14168.

It is an arithmetic number, because the mean of its divisors is an integer number (1133748).

Almost surely, 2^18139296 is an apocalyptic number.

18139296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18139296 is an abundant number, since it is smaller than the sum of its proper divisors (36280608).

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

18139296 is a wasteful number, since it uses less digits than its factorization.

18139296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27013 (or 27005 counting only the distinct ones).

The product of its digits is 23328, while the sum is 39.

The square root of 18139296 is about 4259.0252405920. The cubic root of 18139296 is about 262.7484378128.

The spelling of 18139296 in words is "eighteen million, one hundred thirty-nine thousand, two hundred ninety-six".