633972728 has 8 divisors (see below), whose sum is σ = 1188698880. Its totient is φ = 316986360.

The previous prime is 633972719. The next prime is 633972733. The reversal of 633972728 is 827279336.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39623288 + ... + 39623303.

It is an arithmetic number, because the mean of its divisors is an integer number (148587360).

Almost surely, 2^633972728 is an apocalyptic number.

It is an amenable number.

633972728 is a deficient number, since it is larger than the sum of its proper divisors (554726152).

633972728 is a wasteful number, since it uses less digits than its factorization.

633972728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79246597 (or 79246593 counting only the distinct ones).

The product of its digits is 762048, while the sum is 47.

The square root of 633972728 is about 25178.8150634616. The cubic root of 633972728 is about 859.0600547178.

The spelling of 633972728 in words is "six hundred thirty-three million, nine hundred seventy-two thousand, seven hundred twenty-eight".