633421152 has 144 divisors (see below), whose sum is σ = 2217065760. Its totient is φ = 167049216.

The previous prime is 633421111. The next prime is 633421153. The reversal of 633421152 is 251124336.

633421152 is a `hidden beast` number, since 633 + 4 + 21 + 1 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (633421153) 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 23 ways as a sum of consecutive naturals, for example, 14124 + ... + 38292.

It is an arithmetic number, because the mean of its divisors is an integer number (15396290).

Almost surely, 2^633421152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 633421152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1108532880).

633421152 is an abundant number, since it is smaller than the sum of its proper divisors (1583644608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

633421152 is a wasteful number, since it uses less digits than its factorization.

633421152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24205 (or 24194 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 633421152 is about 25167.8595037401. The cubic root of 633421152 is about 858.8108461047.

Adding to 633421152 its reverse (251124336), we get a palindrome (884545488).

The spelling of 633421152 in words is "six hundred thirty-three million, four hundred twenty-one thousand, one hundred fifty-two".