631488 has 112 divisors (see below), whose sum is σ = 2048256. Its totient is φ = 168960.

The previous prime is 631487. The next prime is 631507. The reversal of 631488 is 884136.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27445 + ... + 27467.

It is an arithmetic number, because the mean of its divisors is an integer number (18288).

2⁶³¹⁴⁸⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1024128).

631488 is an abundant number, since it is smaller than the sum of its proper divisors (1416768).

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

631488 is a wasteful number, since it uses less digits than its factorization.

631488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62 (or 52 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 631488 is about 794.6621923811. The cubic root of 631488 is about 85.7936281204.

It can be divided in two parts, 63 and 1488, that added together give a palindrome (1551).

The spelling of 631488 in words is "six hundred thirty-one thousand, four hundred eighty-eight".