631771460 has 48 divisors (see below), whose sum is σ = 1364573952. Its totient is φ = 245548800.

The previous prime is 631771447. The next prime is 631771471. The reversal of 631771460 is 64177136.

It is a self number, because there is not a number n which added to its sum of digits gives 631771460.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220799 + ... + 223641.

It is an arithmetic number, because the mean of its divisors is an integer number (28428624).

Almost surely, 2^631771460 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 631771460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (682286976).

631771460 is an abundant number, since it is smaller than the sum of its proper divisors (732802492).

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

631771460 is a wasteful number, since it uses less digits than its factorization.

631771460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3164 (or 3162 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 631771460 is about 25135.0643524141. The cubic root of 631771460 is about 858.0646310911.

It can be divided in two parts, 6317 and 71460, that added together give a palindrome (77777).

The spelling of 631771460 in words is "six hundred thirty-one million, seven hundred seventy-one thousand, four hundred sixty".