631360 has 28 divisors (see below), whose sum is σ = 1504188. Its totient is φ = 252416.

The previous prime is 631357. The next prime is 631361. The reversal of 631360 is 63136.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 179776 + 451584 = 424^2 + 672^2 .

It is not an unprimeable number, because it can be changed into a prime (631361) 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, 667 + ... + 1306.

It is an arithmetic number, because the mean of its divisors is an integer number (53721).

2⁶³¹³⁶⁰ is an apocalyptic number.

It is an amenable number.

631360 is an abundant number, since it is smaller than the sum of its proper divisors (872828).

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

631360 is a wasteful number, since it uses less digits than its factorization.

631360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990 (or 1980 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 631360 is about 794.5816509334. The cubic root of 631360 is about 85.7878310578.

Adding to 631360 its reverse (63136), we get a palindrome (694496).

The spelling of 631360 in words is "six hundred thirty-one thousand, three hundred sixty".