631460 has 12 divisors (see below), whose sum is σ = 1326108. Its totient is φ = 252576.

The previous prime is 631459. The next prime is 631469. The reversal of 631460 is 64136.

It can be written as a sum of positive squares in 2 ways, for example, as 252004 + 379456 = 502^2 + 616^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 31573 = 631460 / (6 + 3 + 1 + 4 + 6 + 0).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631469) 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, 15767 + ... + 15806.

It is an arithmetic number, because the mean of its divisors is an integer number (110509).

2⁶³¹⁴⁶⁰ is an apocalyptic number.

It is an amenable number.

631460 is an abundant number, since it is smaller than the sum of its proper divisors (694648).

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

631460 is a wasteful number, since it uses less digits than its factorization.

631460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31582 (or 31580 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 631460 is about 794.6445746370. The cubic root of 631460 is about 85.7923600799.

Adding to 631460 its reverse (64136), we get a palindrome (695596).

The spelling of 631460 in words is "six hundred thirty-one thousand, four hundred sixty".