631749460 has 12 divisors (see below), whose sum is σ = 1326673908. Its totient is φ = 252699776.

The previous prime is 631749431. The next prime is 631749467. The reversal of 631749460 is 64947136.

It can be written as a sum of positive squares in 2 ways, for example, as 429484176 + 202265284 = 20724^2 + 14222^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631749467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15793717 + ... + 15793756.

It is an arithmetic number, because the mean of its divisors is an integer number (110556159).

Almost surely, 2^631749460 is an apocalyptic number.

It is an amenable number.

631749460 is an abundant number, since it is smaller than the sum of its proper divisors (694924448).

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

631749460 is a wasteful number, since it uses less digits than its factorization.

631749460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31587482 (or 31587480 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 631749460 is about 25134.6267129631. The cubic root of 631749460 is about 858.0546709277.

The spelling of 631749460 in words is "six hundred thirty-one million, seven hundred forty-nine thousand, four hundred sixty".