634172112 has 120 divisors (see below), whose sum is σ = 2117572800. Its totient is φ = 181185984.

The previous prime is 634172093. The next prime is 634172113. The reversal of 634172112 is 211271436.

634172112 is a `hidden beast` number, since 634 + 1 + 7 + 21 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634172113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6189 + ... + 36147.

It is an arithmetic number, because the mean of its divisors is an integer number (17646440).

Almost surely, 2^634172112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634172112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1058786400).

634172112 is an abundant number, since it is smaller than the sum of its proper divisors (1483400688).

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

634172112 is a wasteful number, since it uses less digits than its factorization.

634172112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29990 (or 29971 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 634172112 is about 25182.7741124762. The cubic root of 634172112 is about 859.1501032164.

The spelling of 634172112 in words is "six hundred thirty-four million, one hundred seventy-two thousand, one hundred twelve".