12939215400 has 144 divisors (see below), whose sum is σ = 45063782400. Its totient is φ = 3450444480.

The previous prime is 12939215383. The next prime is 12939215407. The reversal of 12939215400 is 451293921.

12939215400 is a `hidden beast` number, since 1 + 2 + 9 + 39 + 215 + 400 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (12939215407) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 84520 + ... + 181719.

Almost surely, 2^12939215400 is an apocalyptic number.

12939215400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12939215400 is an abundant number, since it is smaller than the sum of its proper divisors (32124567000).

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

12939215400 is a wasteful number, since it uses less digits than its factorization.

12939215400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266270 (or 266249 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The spelling of 12939215400 in words is "twelve billion, nine hundred thirty-nine million, two hundred fifteen thousand, four hundred".