631898880 has 144 divisors (see below), whose sum is σ = 2044654080. Its totient is φ = 166293504.

The previous prime is 631898851. The next prime is 631898881. The reversal of 631898880 is 88898136.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (631898881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 302319 + ... + 304401.

Almost surely, 2^631898880 is an apocalyptic number.

631898880 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 631898880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1022327040).

631898880 is an abundant number, since it is smaller than the sum of its proper divisors (1412755200).

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

631898880 is a wasteful number, since it uses less digits than its factorization.

631898880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2186 (or 2172 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 51.

The square root of 631898880 is about 25137.5989306855. The cubic root of 631898880 is about 858.1223139995.

The spelling of 631898880 in words is "six hundred thirty-one million, eight hundred ninety-eight thousand, eight hundred eighty".