12297640 has 32 divisors (see below), whose sum is σ = 28874880. Its totient is φ = 4704832.

The previous prime is 12297631. The next prime is 12297667. The reversal of 12297640 is 4679221.

12297640 = 96² + 97² + ... + 335².

It is an unprimeable number.

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, 5764 + ... + 7603.

It is an arithmetic number, because the mean of its divisors is an integer number (902340).

Almost surely, 2^12297640 is an apocalyptic number.

12297640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12297640 is an abundant number, since it is smaller than the sum of its proper divisors (16577240).

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

12297640 is a wasteful number, since it uses less digits than its factorization.

12297640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13401 (or 13397 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 12297640 is about 3506.7991102999. The cubic root of 12297640 is about 230.8202595986.

The spelling of 12297640 in words is "twelve million, two hundred ninety-seven thousand, six hundred forty".