1297639464 has 64 divisors (see below), whose sum is σ = 3583872000. Its totient is φ = 388240320.

The previous prime is 1297639417. The next prime is 1297639487. The reversal of 1297639464 is 4649367921.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10254 + ... + 51965.

It is an arithmetic number, because the mean of its divisors is an integer number (55998000).

Almost surely, 2^1297639464 is an apocalyptic number.

It is an amenable number.

1297639464 is an abundant number, since it is smaller than the sum of its proper divisors (2286232536).

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

1297639464 is a wasteful number, since it uses less digits than its factorization.

1297639464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62318 (or 62314 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 51.

The square root of 1297639464 is about 36022.7631366612. The cubic root of 1297639464 is about 1090.7319002163.

The spelling of 1297639464 in words is "one billion, two hundred ninety-seven million, six hundred thirty-nine thousand, four hundred sixty-four".