12439439760 has 160 divisors (see below), whose sum is σ = 42696410112. Its totient is φ = 2970570240.

The previous prime is 12439439737. The next prime is 12439439813. The reversal of 12439439760 is 6793493421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141717 + ... + 212043.

Almost surely, 2^12439439760 is an apocalyptic number.

12439439760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12439439760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21348205056).

12439439760 is an abundant number, since it is smaller than the sum of its proper divisors (30256970352).

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

12439439760 is a wasteful number, since it uses less digits than its factorization.

12439439760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70421 (or 70415 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 48.

The spelling of 12439439760 in words is "twelve billion, four hundred thirty-nine million, four hundred thirty-nine thousand, seven hundred sixty".