634543450 has 24 divisors (see below), whose sum is σ = 1182853980. Its totient is φ = 253257600.

The previous prime is 634543417. The next prime is 634543453. The reversal of 634543450 is 54345436.

It can be written as a sum of positive squares in 6 ways, for example, as 132917841 + 501625609 = 11529^2 + 22397^2 .

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (634543453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9286 + ... + 36814.

Almost surely, 2^634543450 is an apocalyptic number.

634543450 is a deficient number, since it is larger than the sum of its proper divisors (548310530).

634543450 is a wasteful number, since it uses less digits than its factorization.

634543450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28002 (or 27997 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 34.

The square root of 634543450 is about 25190.1458908042. The cubic root of 634543450 is about 859.3177616092.

Adding to 634543450 its reverse (54345436), we get a palindrome (688888886).

The spelling of 634543450 in words is "six hundred thirty-four million, five hundred forty-three thousand, four hundred fifty".