12239439424 has 21 divisors (see below), whose sum is σ = 24289394017. Its totient is φ = 6119277184.

The previous prime is 12239439413. The next prime is 12239439431. The reversal of 12239439424 is 42493493221.

The square root of 12239439424 is 110632.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1851753024 + 10387686400 = 43032^2 + 101920^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 878142 + ... + 891970.

Almost surely, 2^12239439424 is an apocalyptic number.

12239439424 is the 110632-nd square number.

It is an amenable number.

12239439424 is a deficient number, since it is larger than the sum of its proper divisors (12049954593).

12239439424 is an frugal number, since it uses more digits than its factorization.

12239439424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27670 (or 13831 counting only the distinct ones).

The product of its digits is 373248, while the sum is 43.

The spelling of 12239439424 in words is "twelve billion, two hundred thirty-nine million, four hundred thirty-nine thousand, four hundred twenty-four".