631245456 has 120 divisors (see below), whose sum is σ = 1825367544. Its totient is φ = 203489280.

The previous prime is 631245427. The next prime is 631245457. The reversal of 631245456 is 654542136.

It can be written as a sum of positive squares in 4 ways, for example, as 361760400 + 269485056 = 19020^2 + 16416^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 631245456.

It is not an unprimeable number, because it can be changed into a prime (631245457) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1369066 + ... + 1369526.

Almost surely, 2^631245456 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 631245456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (912683772).

631245456 is an abundant number, since it is smaller than the sum of its proper divisors (1194122088).

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

631245456 is a wasteful number, since it uses less digits than its factorization.

631245456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769 (or 760 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 631245456 is about 25124.5986236596. The cubic root of 631245456 is about 857.8264274705.

The spelling of 631245456 in words is "six hundred thirty-one million, two hundred forty-five thousand, four hundred fifty-six".