631340 has 12 divisors (see below), whose sum is σ = 1325856. Its totient is φ = 252528.

The previous prime is 631339. The next prime is 631357. The reversal of 631340 is 43136.

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, 15764 + ... + 15803.

It is an arithmetic number, because the mean of its divisors is an integer number (110488).

2⁶³¹³⁴⁰ is an apocalyptic number.

It is an amenable number.

631340 is an abundant number, since it is smaller than the sum of its proper divisors (694516).

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

631340 is a wasteful number, since it uses less digits than its factorization.

631340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31576 (or 31574 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 631340 is about 794.5690655947. The cubic root of 631340 is about 85.7869251960.

Adding to 631340 its reverse (43136), we get a palindrome (674476).

The spelling of 631340 in words is "six hundred thirty-one thousand, three hundred forty".