633135128 has 8 divisors (see below), whose sum is σ = 1187128380. Its totient is φ = 316567560.

The previous prime is 633135127. The next prime is 633135137. The reversal of 633135128 is 821531336.

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

It is a junction number, because it is equal to n+sod(n) for n = 633135094 and 633135103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (633135127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39570938 + ... + 39570953.

Almost surely, 2^633135128 is an apocalyptic number.

It is an amenable number.

633135128 is a deficient number, since it is larger than the sum of its proper divisors (553993252).

633135128 is a wasteful number, since it uses less digits than its factorization.

633135128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79141897 (or 79141893 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 633135128 is about 25162.1765354271. The cubic root of 633135128 is about 858.6815600864.

The spelling of 633135128 in words is "six hundred thirty-three million, one hundred thirty-five thousand, one hundred twenty-eight".