1399374756 has 90 divisors (see below), whose sum is σ = 3834889422. Its totient is φ = 430260480.

The previous prime is 1399374733. The next prime is 1399374761. The reversal of 1399374756 is 6574739931.

It is a happy number.

1399374756 is a `hidden beast` number, since 139 + 9 + 37 + 475 + 6 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 1334733156 + 64641600 = 36534^2 + 8040^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1027516 + ... + 1028876.

Almost surely, 2^1399374756 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 1399374756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1917444711).

1399374756 is an abundant number, since it is smaller than the sum of its proper divisors (2435514666).

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

1399374756 is a wasteful number, since it uses less digits than its factorization.

1399374756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423 (or 1379 counting only the distinct ones).

The product of its digits is 4286520, while the sum is 54.

The square root of 1399374756 is about 37408.2177602729. The cubic root of 1399374756 is about 1118.5223807241.

The spelling of 1399374756 in words is "one billion, three hundred ninety-nine million, three hundred seventy-four thousand, seven hundred fifty-six".