631306336 has 48 divisors (see below), whose sum is σ = 1303495200. Its totient is φ = 300561408.

The previous prime is 631306327. The next prime is 631306363. The reversal of 631306336 is 633603136.

It is a junction number, because it is equal to n+sod(n) for n = 631306298 and 631306307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63085 + ... + 72403.

It is an arithmetic number, because the mean of its divisors is an integer number (27156150).

Almost surely, 2^631306336 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 631306336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (651747600).

631306336 is an abundant number, since it is smaller than the sum of its proper divisors (672188864).

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

631306336 is a wasteful number, since it uses less digits than its factorization.

631306336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9431 (or 9423 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 31.

The square root of 631306336 is about 25125.8101560925. The cubic root of 631306336 is about 857.8540040619.

The spelling of 631306336 in words is "six hundred thirty-one million, three hundred six thousand, three hundred thirty-six".