12399406760 has 128 divisors (see below), whose sum is σ = 30464501760. Its totient is φ = 4514764800.

The previous prime is 12399406709. The next prime is 12399406787. The reversal of 12399406760 is 6760499321.

It is a happy number.

Together with 18065094999 it forms a betrothed pair.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13010444 + ... + 13011396.

It is an arithmetic number, because the mean of its divisors is an integer number (238003920).

Almost surely, 2^12399406760 is an apocalyptic number.

12399406760 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 12399406760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15232250880).

12399406760 is an abundant number, since it is smaller than the sum of its proper divisors (18065095000).

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

12399406760 is a wasteful number, since it uses less digits than its factorization.

12399406760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299 (or 1295 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 47.

The spelling of 12399406760 in words is "twelve billion, three hundred ninety-nine million, four hundred six thousand, seven hundred sixty".