634775790 has 64 divisors (see below), whose sum is σ = 1672296192. Its totient is φ = 152928000.

The previous prime is 634775723. The next prime is 634775833. The reversal of 634775790 is 97577436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47890 + ... + 59690.

It is an arithmetic number, because the mean of its divisors is an integer number (26129628).

Almost surely, 2^634775790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634775790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (836148096).

634775790 is an abundant number, since it is smaller than the sum of its proper divisors (1037520402).

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

634775790 is a wasteful number, since it uses less digits than its factorization.

634775790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11985.

The product of its (nonzero) digits is 1111320, while the sum is 48.

The square root of 634775790 is about 25194.7571927177. The cubic root of 634775790 is about 859.4226294087.

The spelling of 634775790 in words is "six hundred thirty-four million, seven hundred seventy-five thousand, seven hundred ninety".