1379844864 has 54 divisors (see below), whose sum is σ = 3978439556. Its totient is φ = 459947520.

The previous prime is 1379844863. The next prime is 1379844881. The reversal of 1379844864 is 4684489731.

1379844864 is a `hidden beast` number, since 13 + 79 + 84 + 486 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1379844864.

It is not an unprimeable number, because it can be changed into a prime (1379844863) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 297142 + ... + 301749.

Almost surely, 2^1379844864 is an apocalyptic number.

It is an amenable number.

1379844864 is an abundant number, since it is smaller than the sum of its proper divisors (2598594692).

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

1379844864 is an equidigital number, since it uses as much as digits as its factorization.

1379844864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598913 (or 598896 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The square root of 1379844864 is about 37146.2631229576. The cubic root of 1379844864 is about 1113.2945605041.

The spelling of 1379844864 in words is "one billion, three hundred seventy-nine million, eight hundred forty-four thousand, eight hundred sixty-four".