634709992 has 32 divisors (see below), whose sum is σ = 1363176000. Its totient is φ = 271401984.

The previous prime is 634709987. The next prime is 634709993. The reversal of 634709992 is 299907436.

It is not an unprimeable number, because it can be changed into a prime (634709993) 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 7 ways as a sum of consecutive naturals, for example, 12523 + ... + 37765.

It is an arithmetic number, because the mean of its divisors is an integer number (42599250).

Almost surely, 2^634709992 is an apocalyptic number.

It is an amenable number.

634709992 is an abundant number, since it is smaller than the sum of its proper divisors (728466008).

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

634709992 is a wasteful number, since it uses less digits than its factorization.

634709992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25705 (or 25701 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 49.

The square root of 634709992 is about 25193.4513713385. The cubic root of 634709992 is about 859.3929337560.

The spelling of 634709992 in words is "six hundred thirty-four million, seven hundred nine thousand, nine hundred ninety-two".