634781712 has 20 divisors (see below), whose sum is σ = 1639852880. Its totient is φ = 211593888.

The previous prime is 634781663. The next prime is 634781713. The reversal of 634781712 is 217187436.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (634781713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6612262 + ... + 6612357.

It is an arithmetic number, because the mean of its divisors is an integer number (81992644).

Almost surely, 2^634781712 is an apocalyptic number.

It is an amenable number.

634781712 is an abundant number, since it is smaller than the sum of its proper divisors (1005071168).

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

634781712 is a wasteful number, since it uses less digits than its factorization.

634781712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13224630 (or 13224624 counting only the distinct ones).

The product of its digits is 56448, while the sum is 39.

The square root of 634781712 is about 25194.8747168943. The cubic root of 634781712 is about 859.4253019980.

The spelling of 634781712 in words is "six hundred thirty-four million, seven hundred eighty-one thousand, seven hundred twelve".