12897271400 has 96 divisors (see below), whose sum is σ = 32702073600. Its totient is φ = 4701715200.

The previous prime is 12897271393. The next prime is 12897271427. The reversal of 12897271400 is 417279821.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 174005 + ... + 236795.

It is an arithmetic number, because the mean of its divisors is an integer number (340646600).

Almost surely, 2^12897271400 is an apocalyptic number.

12897271400 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 12897271400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16351036800).

12897271400 is an abundant number, since it is smaller than the sum of its proper divisors (19804802200).

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

12897271400 is a wasteful number, since it uses less digits than its factorization.

12897271400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62899 (or 62890 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 41.

The spelling of 12897271400 in words is "twelve billion, eight hundred ninety-seven million, two hundred seventy-one thousand, four hundred".