1315790856 has 24 divisors (see below), whose sum is σ = 3563600430. Its totient is φ = 438596928.

The previous prime is 1315790821. The next prime is 1315790867. The reversal of 1315790856 is 6580975131.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 732568356 + 583222500 = 27066^2 + 24150^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9137365 + ... + 9137508.

Almost surely, 2^1315790856 is an apocalyptic number.

It is an amenable number.

1315790856 is an abundant number, since it is smaller than the sum of its proper divisors (2247809574).

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

1315790856 is a wasteful number, since it uses less digits than its factorization.

1315790856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18274885 (or 18274878 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The square root of 1315790856 is about 36273.8315594038. The cubic root of 1315790856 is about 1095.7940921544.

The spelling of 1315790856 in words is "one billion, three hundred fifteen million, seven hundred ninety thousand, eight hundred fifty-six".