315878440 has 64 divisors (see below), whose sum is σ = 738460800. Its totient is φ = 121459968.

The previous prime is 315878429. The next prime is 315878447. The reversal of 315878440 is 44878513.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 315878393 and 315878402.

It is not an unprimeable number, because it can be changed into a prime (315878447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 355677 + ... + 356563.

It is an arithmetic number, because the mean of its divisors is an integer number (11538450).

Almost surely, 2^315878440 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 315878440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (369230400).

315878440 is an abundant number, since it is smaller than the sum of its proper divisors (422582360).

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

315878440 is a wasteful number, since it uses less digits than its factorization.

315878440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234 (or 1230 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 315878440 is about 17772.9693636151. The cubic root of 315878440 is about 681.0411099303.

The spelling of 315878440 in words is "three hundred fifteen million, eight hundred seventy-eight thousand, four hundred forty".