12439400832 has 48 divisors (see below), whose sum is σ = 35795674980. Its totient is φ = 4146466560.

The previous prime is 12439400821. The next prime is 12439400839. The reversal of 12439400832 is 23800493421.

12439400832 is a `hidden beast` number, since 1 + 243 + 9 + 400 + 8 + 3 + 2 = 666.

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

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12439400839) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5397894 + ... + 5400197.

Almost surely, 2^12439400832 is an apocalyptic number.

12439400832 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12439400832 is an abundant number, since it is smaller than the sum of its proper divisors (23356274148).

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

12439400832 is a wasteful number, since it uses less digits than its factorization.

12439400832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10798111 (or 10798096 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 12439400832 in words is "twelve billion, four hundred thirty-nine million, four hundred thousand, eight hundred thirty-two".