631488244 has 6 divisors (see below), whose sum is σ = 1105104434. Its totient is φ = 315744120.

The previous prime is 631488241. The next prime is 631488283. The reversal of 631488244 is 442884136.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 630512100 + 976144 = 25110^2 + 988^2 .

It is a junction number, because it is equal to n+sod(n) for n = 631488197 and 631488206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631488241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78936027 + ... + 78936034.

Almost surely, 2^631488244 is an apocalyptic number.

It is an amenable number.

631488244 is a deficient number, since it is larger than the sum of its proper divisors (473616190).

631488244 is a wasteful number, since it uses less digits than its factorization.

631488244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157872065 (or 157872063 counting only the distinct ones).

The product of its digits is 147456, while the sum is 40.

The square root of 631488244 is about 25129.4298383390. The cubic root of 631488244 is about 857.9363917034.

The spelling of 631488244 in words is "six hundred thirty-one million, four hundred eighty-eight thousand, two hundred forty-four".