12957309240 has 32 divisors (see below), whose sum is σ = 38871928080. Its totient is φ = 3455282432.

The previous prime is 12957309221. The next prime is 12957309241. The reversal of 12957309240 is 4290375921.

It is a junction number, because it is equal to n+sod(n) for n = 12957309192 and 12957309201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12957309241) 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 7 ways as a sum of consecutive naturals, for example, 53988669 + ... + 53988908.

Almost surely, 2^12957309240 is an apocalyptic number.

12957309240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12957309240 is an abundant number, since it is smaller than the sum of its proper divisors (25914618840).

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

12957309240 is a wasteful number, since it uses less digits than its factorization.

12957309240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107977591 (or 107977587 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 42.

The spelling of 12957309240 in words is "twelve billion, nine hundred fifty-seven million, three hundred nine thousand, two hundred forty".