12889699400 has 24 divisors (see below), whose sum is σ = 29968551570. Its totient is φ = 5155879680.

The previous prime is 12889699373. The next prime is 12889699423. The reversal of 12889699400 is 499698821.

It can be written as a sum of positive squares in 3 ways, for example, as 6009660484 + 6880038916 = 77522^2 + 82946^2 .

It is a super-2 number, since 2×12889699400² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32224049 + ... + 32224448.

Almost surely, 2^12889699400 is an apocalyptic number.

12889699400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12889699400 is an abundant number, since it is smaller than the sum of its proper divisors (17078852170).

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

12889699400 is a wasteful number, since it uses less digits than its factorization.

12889699400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64448513 (or 64448504 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 56.

The spelling of 12889699400 in words is "twelve billion, eight hundred eighty-nine million, six hundred ninety-nine thousand, four hundred".