631805328 has 240 divisors, whose sum is σ = 2321280000. Its totient is φ = 155416320.

The previous prime is 631805287. The next prime is 631805333. The reversal of 631805328 is 823508136.

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

It is a junction number, because it is equal to n+sod(n) for n = 631805292 and 631805301.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 209173 + ... + 212171.

It is an arithmetic number, because the mean of its divisors is an integer number (9672000).

Almost surely, 2^631805328 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 631805328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1160640000).

631805328 is an abundant number, since it is smaller than the sum of its proper divisors (1689474672).

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

631805328 is a wasteful number, since it uses less digits than its factorization.

631805328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3050 (or 3041 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 631805328 is about 25135.7380635620. The cubic root of 631805328 is about 858.0799638580.

The spelling of 631805328 in words is "six hundred thirty-one million, eight hundred five thousand, three hundred twenty-eight".