634400264 has 24 divisors (see below), whose sum is σ = 1197531930. Its totient is φ = 315064320.

The previous prime is 634400209. The next prime is 634400267. The reversal of 634400264 is 462004436.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 632120164 + 2280100 = 25142^2 + 1510^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634400267) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 989384 + ... + 990024.

Almost surely, 2^634400264 is an apocalyptic number.

It is an amenable number.

634400264 is a deficient number, since it is larger than the sum of its proper divisors (563131666).

634400264 is an equidigital number, since it uses as much as digits as its factorization.

634400264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1481 (or 836 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

The square root of 634400264 is about 25187.3036270261. The cubic root of 634400264 is about 859.2531211557.

The spelling of 634400264 in words is "six hundred thirty-four million, four hundred thousand, two hundred sixty-four".