12457947400 has 24 divisors (see below), whose sum is σ = 28964728170. Its totient is φ = 4983178880.

The previous prime is 12457947391. The next prime is 12457947407. The reversal of 12457947400 is 474975421.

It can be written as a sum of positive squares in 3 ways, for example, as 5144619076 + 7313328324 = 71726^2 + 85518^2 .

It is not an unprimeable number, because it can be changed into a prime (12457947407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31144669 + ... + 31145068.

Almost surely, 2^12457947400 is an apocalyptic number.

12457947400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12457947400 is an abundant number, since it is smaller than the sum of its proper divisors (16506780770).

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

12457947400 is a wasteful number, since it uses less digits than its factorization.

12457947400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62289753 (or 62289744 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 43.

The spelling of 12457947400 in words is "twelve billion, four hundred fifty-seven million, nine hundred forty-seven thousand, four hundred".