631020888 has 64 divisors (see below), whose sum is σ = 1758096000. Its totient is φ = 209709216.

The previous prime is 631020883. The next prime is 631020899. The reversal of 631020888 is 888020136.

631020888 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×631020888² = 796374722184617088, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631020881) 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, 70743 + ... + 79161.

It is an arithmetic number, because the mean of its divisors is an integer number (27470250).

Almost surely, 2^631020888 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 631020888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (879048000).

631020888 is an abundant number, since it is smaller than the sum of its proper divisors (1127075112).

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

631020888 is a wasteful number, since it uses less digits than its factorization.

631020888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8781 (or 8771 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 631020888 is about 25120.1291397954. The cubic root of 631020888 is about 857.7246903876.

The spelling of 631020888 in words is "six hundred thirty-one million, twenty thousand, eight hundred eighty-eight".