313638 has 16 divisors (see below), whose sum is σ = 675696. Its totient is φ = 96480.

The previous prime is 313637. The next prime is 313639. The reversal of 313638 is 836313.

It is an interprime number because it is at equal distance from previous prime (313637) and next prime (313639).

It is a plaindrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313637) 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, 1933 + ... + 2088.

It is an arithmetic number, because the mean of its divisors is an integer number (42231).

2³¹³⁶³⁸ is an apocalyptic number.

313638 is an abundant number, since it is smaller than the sum of its proper divisors (362058).

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

313638 is a wasteful number, since it uses less digits than its factorization.

313638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4039.

The product of its digits is 1296, while the sum is 24.

The square root of 313638 is about 560.0339275437. The cubic root of 313638 is about 67.9427141528.

The spelling of 313638 in words is "three hundred thirteen thousand, six hundred thirty-eight".