315438 has 16 divisors (see below), whose sum is σ = 664320. Its totient is φ = 99576.

The previous prime is 315437. The next prime is 315449. The reversal of 315438 is 834513.

It is a super-2 number, since 2×315438² = 199002263688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1270 + ... + 1497.

It is an arithmetic number, because the mean of its divisors is an integer number (41520).

2³¹⁵⁴³⁸ is an apocalyptic number.

315438 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

315438 is an abundant number, since it is smaller than the sum of its proper divisors (348882).

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

315438 is a wasteful number, since it uses less digits than its factorization.

315438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2791.

The product of its digits is 1440, while the sum is 24.

The square root of 315438 is about 561.6386738821. The cubic root of 315438 is about 68.0724429809.

The spelling of 315438 in words is "three hundred fifteen thousand, four hundred thirty-eight".