631389120 has 112 divisors (see below), whose sum is σ = 2011728768. Its totient is φ = 167777280.

The previous prime is 631389103. The next prime is 631389193. The reversal of 631389120 is 21983136.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316767 + ... + 318753.

It is an arithmetic number, because the mean of its divisors is an integer number (17961864).

Almost surely, 2^631389120 is an apocalyptic number.

631389120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631389120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1005864384).

631389120 is an abundant number, since it is smaller than the sum of its proper divisors (1380339648).

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

631389120 is a wasteful number, since it uses less digits than its factorization.

631389120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2338 (or 2328 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 631389120 is about 25127.4574917559. The cubic root of 631389120 is about 857.8914995840.

The spelling of 631389120 in words is "six hundred thirty-one million, three hundred eighty-nine thousand, one hundred twenty".