1392279845 has 54 divisors (see below), whose sum is σ = 1934560278. Its totient is φ = 961171200.

The previous prime is 1392279829. The next prime is 1392279857. The reversal of 1392279845 is 5489722931.

It can be written as a sum of positive squares in 9 ways, for example, as 408767524 + 983512321 = 20218^2 + 31361^2 .

It is not a de Polignac number, because 1392279845 - 2⁴ = 1392279829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1392279793 and 1392279802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 33958025 + ... + 33958065.

Almost surely, 2^1392279845 is an apocalyptic number.

It is an amenable number.

1392279845 is a deficient number, since it is larger than the sum of its proper divisors (542280433).

1392279845 is an equidigital number, since it uses as much as digits as its factorization.

1392279845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 94 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 50.

The square root of 1392279845 is about 37313.2663405390. The cubic root of 1392279845 is about 1116.6288526093.

The spelling of 1392279845 in words is "one billion, three hundred ninety-two million, two hundred seventy-nine thousand, eight hundred forty-five".