312680 has 16 divisors (see below), whose sum is σ = 703620. Its totient is φ = 125056.

The previous prime is 312679. The next prime is 312701. The reversal of 312680 is 86213.

It can be written as a sum of positive squares in 2 ways, for example, as 256036 + 56644 = 506^2 + 238^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3869 + ... + 3948.

2³¹²⁶⁸⁰ is an apocalyptic number.

It is an amenable number.

312680 is an abundant number, since it is smaller than the sum of its proper divisors (390940).

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

312680 is a wasteful number, since it uses less digits than its factorization.

312680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7828 (or 7824 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 312680 is about 559.1779680924. The cubic root of 312680 is about 67.8734671186.

Adding to 312680 its reverse (86213), we get a palindrome (398893).

The spelling of 312680 in words is "three hundred twelve thousand, six hundred eighty".