631894440 has 32 divisors (see below), whose sum is σ = 1895683680. Its totient is φ = 168505152.

The previous prime is 631894423. The next prime is 631894441. The reversal of 631894440 is 44498136.

It is a happy number.

631894440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (631894441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2632774 + ... + 2633013.

It is an arithmetic number, because the mean of its divisors is an integer number (59240115).

Almost surely, 2^631894440 is an apocalyptic number.

631894440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

631894440 is an abundant number, since it is smaller than the sum of its proper divisors (1263789240).

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

631894440 is a wasteful number, since it uses less digits than its factorization.

631894440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5265801 (or 5265797 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 631894440 is about 25137.5106166064. The cubic root of 631894440 is about 858.1203041462.

The spelling of 631894440 in words is "six hundred thirty-one million, eight hundred ninety-four thousand, four hundred forty".