1397715264 has 280 divisors, whose sum is σ = 4579120128. Its totient is φ = 418037760.

The previous prime is 1397715257. The next prime is 1397715331. The reversal of 1397715264 is 4625177931.

Its product of digits (317520) is a multiple of the sum of its prime divisors (336).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7241952 + ... + 7242144.

Almost surely, 2^1397715264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1397715264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2289560064).

1397715264 is an abundant number, since it is smaller than the sum of its proper divisors (3181404864).

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

1397715264 is a wasteful number, since it uses less digits than its factorization.

1397715264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355 (or 336 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 1397715264 is about 37386.0303321976. The cubic root of 1397715264 is about 1118.0800610013.

It can be divided in two parts, 13977 and 15264, that added together give a square (29241 = 171²).

The spelling of 1397715264 in words is "one billion, three hundred ninety-seven million, seven hundred fifteen thousand, two hundred sixty-four".