12979390788 has 72 divisors (see below), whose sum is σ = 40380337088. Its totient is φ = 3423135168.

The previous prime is 12979390763. The next prime is 12979390799. The reversal of 12979390788 is 88709397921.

It is a Harshad number since it is a multiple of its sum of digits (63).

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 23 ways as a sum of consecutive naturals, for example, 1977706 + ... + 1984257.

Almost surely, 2^12979390788 is an apocalyptic number.

12979390788 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12979390788 is an abundant number, since it is smaller than the sum of its proper divisors (27400946300).

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

12979390788 is a wasteful number, since it uses less digits than its factorization.

12979390788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3961993 (or 3961988 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 63.

The spelling of 12979390788 in words is "twelve billion, nine hundred seventy-nine million, three hundred ninety thousand, seven hundred eighty-eight".