633648387 has 16 divisors (see below), whose sum is σ = 865294848. Its totient is φ = 412235040.

The previous prime is 633648349. The next prime is 633648391. The reversal of 633648387 is 783846336.

It is a de Polignac number, because none of the positive numbers 2^k-633648387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (633648187) 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 in 15 ways as a sum of consecutive naturals, for example, 264937 + ... + 267317.

It is an arithmetic number, because the mean of its divisors is an integer number (54080928).

Almost surely, 2^633648387 is an apocalyptic number.

633648387 is a deficient number, since it is larger than the sum of its proper divisors (231646461).

633648387 is a wasteful number, since it uses less digits than its factorization.

633648387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4490.

The product of its digits is 1741824, while the sum is 48.

The square root of 633648387 is about 25172.3734876153. The cubic root of 633648387 is about 858.9135311036.

The spelling of 633648387 in words is "six hundred thirty-three million, six hundred forty-eight thousand, three hundred eighty-seven".