634709922 has 64 divisors (see below), whose sum is σ = 1586995200. Its totient is φ = 164407680.

The previous prime is 634709899. The next prime is 634709923. The reversal of 634709922 is 229907436.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (634709923) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 187279 + ... + 190637.

It is an arithmetic number, because the mean of its divisors is an integer number (24796800).

Almost surely, 2^634709922 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634709922, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (793497600).

634709922 is an abundant number, since it is smaller than the sum of its proper divisors (952285278).

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

634709922 is a wasteful number, since it uses less digits than its factorization.

634709922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3791.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 634709922 is about 25193.4499820886. The cubic root of 634709922 is about 859.3929021628.

The spelling of 634709922 in words is "six hundred thirty-four million, seven hundred nine thousand, nine hundred twenty-two".