315638 has 8 divisors (see below), whose sum is σ = 478632. Its totient is φ = 156096.

The previous prime is 315631. The next prime is 315643. The reversal of 315638 is 836513.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 620 + ... + 1007.

It is an arithmetic number, because the mean of its divisors is an integer number (59829).

2³¹⁵⁶³⁸ is an apocalyptic number.

315638 is a deficient number, since it is larger than the sum of its proper divisors (162994).

315638 is a wasteful number, since it uses less digits than its factorization.

315638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1726.

The product of its digits is 2160, while the sum is 26.

The square root of 315638 is about 561.8166960851. The cubic root of 315638 is about 68.0868268030.

The spelling of 315638 in words is "three hundred fifteen thousand, six hundred thirty-eight".