13239144 has 24 divisors (see below), whose sum is σ = 35856210. Its totient is φ = 4413024.

The previous prime is 13239137. The next prime is 13239199. The reversal of 13239144 is 44193231.

It can be written as a sum of positive squares in only one way, i.e., 8122500 + 5116644 = 2850^2 + 2262^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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 5 ways as a sum of consecutive naturals, for example, 91867 + ... + 92010.

Almost surely, 2^13239144 is an apocalyptic number.

It is an amenable number.

13239144 is an abundant number, since it is smaller than the sum of its proper divisors (22617066).

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

13239144 is a wasteful number, since it uses less digits than its factorization.

13239144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183889 (or 183882 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 13239144 is about 3638.5634527929. The cubic root of 13239144 is about 236.5665312896.

The spelling of 13239144 in words is "thirteen million, two hundred thirty-nine thousand, one hundred forty-four".