31630394880 has 480 divisors, whose sum is σ = 130652780544. Its totient is φ = 6914654208.

The previous prime is 31630394863. The next prime is 31630394899. The reversal of 31630394880 is 8849303613.

31630394880 is a `hidden beast` number, since 3 + 1 + 630 + 3 + 9 + 4 + 8 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3705177 + ... + 3713703.

Almost surely, 2^31630394880 is an apocalyptic number.

31630394880 is a gapful number since it is divisible by the number (30) 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 31630394880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65326390272).

31630394880 is an abundant number, since it is smaller than the sum of its proper divisors (99022385664).

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

31630394880 is a wasteful number, since it uses less digits than its factorization.

31630394880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8586 (or 8567 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 31630394880 in words is "thirty-one billion, six hundred thirty million, three hundred ninety-four thousand, eight hundred eighty".