634722690 has 64 divisors (see below), whose sum is σ = 1769529600. Its totient is φ = 142698240.

The previous prime is 634722689. The next prime is 634722713. The reversal of 634722690 is 96227436.

It is a super-2 number, since 2×634722690² = 805745786401672200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11965 + ... + 37584.

It is an arithmetic number, because the mean of its divisors is an integer number (27648900).

Almost surely, 2^634722690 is an apocalyptic number.

634722690 is an abundant number, since it is smaller than the sum of its proper divisors (1134806910).

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

634722690 is a wasteful number, since it uses less digits than its factorization.

634722690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49627.

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 634722690 is about 25193.7033800114. The cubic root of 634722690 is about 859.3986647191.

The spelling of 634722690 in words is "six hundred thirty-four million, seven hundred twenty-two thousand, six hundred ninety".