1397340864 has 84 divisors (see below), whose sum is σ = 4216059640. Its totient is φ = 441262080.

The previous prime is 1397340839. The next prime is 1397340881. The reversal of 1397340864 is 4680437931.

It is a super-2 number, since 2×1397340864² = 3905122980408532992, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52897 + ... + 74784.

Almost surely, 2^1397340864 is an apocalyptic number.

It is an amenable number.

1397340864 is an abundant number, since it is smaller than the sum of its proper divisors (2818718776).

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

1397340864 is a wasteful number, since it uses less digits than its factorization.

1397340864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127718 (or 127705 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 1397340864 is about 37381.0227789449. The cubic root of 1397340864 is about 1117.9802203141.

The spelling of 1397340864 in words is "one billion, three hundred ninety-seven million, three hundred forty thousand, eight hundred sixty-four".