634423400 has 48 divisors (see below), whose sum is σ = 1588505100. Its totient is φ = 234247680.

The previous prime is 634423399. The next prime is 634423429. The reversal of 634423400 is 4324436.

It can be written as a sum of positive squares in 6 ways, for example, as 9523396 + 624900004 = 3086^2 + 24998^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 634423400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119405 + ... + 124604.

Almost surely, 2^634423400 is an apocalyptic number.

It is an amenable number.

634423400 is an abundant number, since it is smaller than the sum of its proper divisors (954081700).

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

634423400 is a wasteful number, since it uses less digits than its factorization.

634423400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244038 (or 244029 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

The square root of 634423400 is about 25187.7629018537. The cubic root of 634423400 is about 859.2635664218.

Adding to 634423400 its reverse (4324436), we get a palindrome (638747836).

The spelling of 634423400 in words is "six hundred thirty-four million, four hundred twenty-three thousand, four hundred".