315991494 has 192 divisors, whose sum is σ = 894566400. Its totient is φ = 80015040.

The previous prime is 315991493. The next prime is 315991513. The reversal of 315991494 is 494199513.

315991494 is a `hidden beast` number, since 3 + 159 + 9 + 1 + 494 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315991493) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2488059 + ... + 2488185.

It is an arithmetic number, because the mean of its divisors is an integer number (4659200).

Almost surely, 2^315991494 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 315991494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (447283200).

315991494 is an abundant number, since it is smaller than the sum of its proper divisors (578574906).

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

315991494 is a wasteful number, since it uses less digits than its factorization.

315991494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200 (or 183 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 315991494 is about 17776.1495830790. The cubic root of 315991494 is about 681.1223492387.

The spelling of 315991494 in words is "three hundred fifteen million, nine hundred ninety-one thousand, four hundred ninety-four".