633438628 has 6 divisors (see below), whose sum is σ = 1108517606. Its totient is φ = 316719312.

The previous prime is 633438623. The next prime is 633438629. The reversal of 633438628 is 826834336.

It can be written as a sum of positive squares in only one way, i.e., 633428224 + 10404 = 25168^2 + 102^2 .

It is not an unprimeable number, because it can be changed into a prime (633438623) 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 as a sum of consecutive naturals, namely, 79179825 + ... + 79179832.

Almost surely, 2^633438628 is an apocalyptic number.

It is an amenable number.

633438628 is a deficient number, since it is larger than the sum of its proper divisors (475078978).

633438628 is a wasteful number, since it uses less digits than its factorization.

633438628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158359661 (or 158359659 counting only the distinct ones).

The product of its digits is 497664, while the sum is 43.

The square root of 633438628 is about 25168.2066901875. The cubic root of 633438628 is about 858.8187441887.

The spelling of 633438628 in words is "six hundred thirty-three million, four hundred thirty-eight thousand, six hundred twenty-eight".