634839090 has 32 divisors (see below), whose sum is σ = 1524277440. Its totient is φ = 169216704.

The previous prime is 634839089. The next prime is 634839097. The reversal of 634839090 is 90938436.

It is not an unprimeable number, because it can be changed into a prime (634839097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127732 + ... + 132608.

It is an arithmetic number, because the mean of its divisors is an integer number (47633670).

Almost surely, 2^634839090 is an apocalyptic number.

634839090 is an abundant number, since it is smaller than the sum of its proper divisors (889438350).

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

634839090 is a wasteful number, since it uses less digits than its factorization.

634839090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9226.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 634839090 is about 25196.0133751354. The cubic root of 634839090 is about 859.4511957387.

The spelling of 634839090 in words is "six hundred thirty-four million, eight hundred thirty-nine thousand, ninety".