631496280 has 256 divisors, whose sum is σ = 2148664320. Its totient is φ = 147603456.

The previous prime is 631496273. The next prime is 631496317. The reversal of 631496280 is 82694136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2017404 + ... + 2017716.

It is an arithmetic number, because the mean of its divisors is an integer number (8393220).

Almost surely, 2^631496280 is an apocalyptic number.

631496280 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 631496280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1074332160).

631496280 is an abundant number, since it is smaller than the sum of its proper divisors (1517168040).

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

631496280 is a wasteful number, since it uses less digits than its factorization.

631496280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410 (or 406 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 631496280 is about 25129.5897300374. The cubic root of 631496280 is about 857.9400309095.

The spelling of 631496280 in words is "six hundred thirty-one million, four hundred ninety-six thousand, two hundred eighty".