315640332 has 72 divisors (see below), whose sum is σ = 914065152. Its totient is φ = 89964000.

The previous prime is 315640279. The next prime is 315640363. The reversal of 315640332 is 233046513.

It is a happy number.

315640332 is a `hidden beast` number, since 3 + 15 + 640 + 3 + 3 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 315640296 and 315640305.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122457 + ... + 125007.

Almost surely, 2^315640332 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 315640332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (457032576).

315640332 is an abundant number, since it is smaller than the sum of its proper divisors (598424820).

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

315640332 is a wasteful number, since it uses less digits than its factorization.

315640332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3059 (or 3054 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 315640332 is about 17766.2695015020. The cubic root of 315640332 is about 680.8699448252.

Adding to 315640332 its reverse (233046513), we get a palindrome (548686845).

The spelling of 315640332 in words is "three hundred fifteen million, six hundred forty thousand, three hundred thirty-two".