634426056 has 96 divisors (see below), whose sum is σ = 1906351200. Its totient is φ = 188977920.

The previous prime is 634426027. The next prime is 634426063. The reversal of 634426056 is 650624436.

634426056 is a `hidden beast` number, since 6 + 3 + 4 + 42 + 605 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 634426056.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39940 + ... + 53516.

It is an arithmetic number, because the mean of its divisors is an integer number (19857825).

Almost surely, 2^634426056 is an apocalyptic number.

634426056 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634426056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (953175600).

634426056 is an abundant number, since it is smaller than the sum of its proper divisors (1271925144).

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

634426056 is a wasteful number, since it uses less digits than its factorization.

634426056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13659 (or 13652 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The square root of 634426056 is about 25187.8156258140. The cubic root of 634426056 is about 859.2647655163.

It can be divided in two parts, 6344 and 26056, that added together give a square (32400 = 180²).

The spelling of 634426056 in words is "six hundred thirty-four million, four hundred twenty-six thousand, fifty-six".