634786794 has 80 divisors (see below), whose sum is σ = 1462779648. Its totient is φ = 205655328.

The previous prime is 634786759. The next prime is 634786811. The reversal of 634786794 is 497687436.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 634786794.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2002324 + ... + 2002640.

Almost surely, 2^634786794 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634786794, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (731389824).

634786794 is an abundant number, since it is smaller than the sum of its proper divisors (827992854).

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

634786794 is a wasteful number, since it uses less digits than its factorization.

634786794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641 (or 632 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 54.

The square root of 634786794 is about 25194.9755705379. The cubic root of 634786794 is about 859.4275954834.

The spelling of 634786794 in words is "six hundred thirty-four million, seven hundred eighty-six thousand, seven hundred ninety-four".