631238480 has 50 divisors (see below), whose sum is σ = 1495853106. Its totient is φ = 247731328.

The previous prime is 631238479. The next prime is 631238507. The reversal of 631238480 is 84832136.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 23104 + 631215376 = 152^2 + 25124^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 631238480.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 11910134 + ... + 11910186.

Almost surely, 2^631238480 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 631238480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (747926553).

631238480 is an abundant number, since it is smaller than the sum of its proper divisors (864614626).

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

631238480 is an frugal number, since it uses more digits than its factorization.

631238480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 631238480 is about 25124.4597951876. The cubic root of 631238480 is about 857.8232674640.

The spelling of 631238480 in words is "six hundred thirty-one million, two hundred thirty-eight thousand, four hundred eighty".