631280384 has 72 divisors (see below), whose sum is σ = 1479185568. Its totient is φ = 263208960.

The previous prime is 631280357. The next prime is 631280413. The reversal of 631280384 is 483082136.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61544 + ... + 71064.

It is an arithmetic number, because the mean of its divisors is an integer number (20544244).

Almost surely, 2^631280384 is an apocalyptic number.

631280384 is a gapful number since it is divisible by the number (64) 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 631280384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (739592784).

631280384 is an abundant number, since it is smaller than the sum of its proper divisors (847905184).

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

631280384 is an equidigital number, since it uses as much as digits as its factorization.

631280384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9581 (or 9567 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 631280384 is about 25125.2937097261. The cubic root of 631280384 is about 857.8422488960.

The spelling of 631280384 in words is "six hundred thirty-one million, two hundred eighty thousand, three hundred eighty-four".