315391878 has 48 divisors (see below), whose sum is σ = 710732880. Its totient is φ = 100957248.

The previous prime is 315391877. The next prime is 315391883. The reversal of 315391878 is 878193513.

315391878 is a `hidden beast` number, since 31 + 539 + 1 + 87 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315391877) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101301 + ... + 104367.

It is an arithmetic number, because the mean of its divisors is an integer number (14806935).

Almost surely, 2^315391878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 315391878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (355366440).

315391878 is an abundant number, since it is smaller than the sum of its proper divisors (395341002).

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

315391878 is a wasteful number, since it uses less digits than its factorization.

315391878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3301 (or 3298 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 315391878 is about 17759.2758298304. The cubic root of 315391878 is about 680.6912506500.

The spelling of 315391878 in words is "three hundred fifteen million, three hundred ninety-one thousand, eight hundred seventy-eight".