634243844 has 12 divisors (see below), whose sum is σ = 1195305804. Its totient is φ = 292727904.

The previous prime is 634243843. The next prime is 634243867. The reversal of 634243844 is 448342436.

It can be written as a sum of positive squares in 2 ways, for example, as 71605444 + 562638400 = 8462^2 + 23720^2 .

It is a junction number, because it is equal to n+sod(n) for n = 634243798 and 634243807.

It is not an unprimeable number, because it can be changed into a prime (634243843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6098447 + ... + 6098550.

It is an arithmetic number, because the mean of its divisors is an integer number (99608817).

Almost surely, 2^634243844 is an apocalyptic number.

It is an amenable number.

634243844 is a deficient number, since it is larger than the sum of its proper divisors (561061960).

634243844 is a wasteful number, since it uses less digits than its factorization.

634243844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12197014 (or 12197012 counting only the distinct ones).

The product of its digits is 221184, while the sum is 38.

The square root of 634243844 is about 25184.1982997275. The cubic root of 634243844 is about 859.1824951757.

The spelling of 634243844 in words is "six hundred thirty-four million, two hundred forty-three thousand, eight hundred forty-four".