315712872 has 24 divisors (see below), whose sum is σ = 855055890. Its totient is φ = 105237600.

The previous prime is 315712871. The next prime is 315712883. The reversal of 315712872 is 278217513.

315712872 is a `hidden beast` number, since 3 + 1 + 571 + 2 + 87 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 292615236 + 23097636 = 17106^2 + 4806^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (315712871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2192379 + ... + 2192522.

Almost surely, 2^315712872 is an apocalyptic number.

It is an amenable number.

315712872 is an abundant number, since it is smaller than the sum of its proper divisors (539343018).

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

315712872 is a wasteful number, since it uses less digits than its factorization.

315712872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4384913 (or 4384906 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 315712872 is about 17768.3108932729. The cubic root of 315712872 is about 680.9220996753.

It can be divided in two parts, 31571 and 2872, that added together give a palindrome (34443).

The spelling of 315712872 in words is "three hundred fifteen million, seven hundred twelve thousand, eight hundred seventy-two".