633640252 has 48 divisors (see below), whose sum is σ = 1347917760. Its totient is φ = 254426112.

The previous prime is 633640237. The next prime is 633640261. The reversal of 633640252 is 252046336.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106098 + ... + 111910.

It is an arithmetic number, because the mean of its divisors is an integer number (28081620).

Almost surely, 2^633640252 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 633640252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (673958880).

633640252 is an abundant number, since it is smaller than the sum of its proper divisors (714277508).

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

633640252 is a wasteful number, since it uses less digits than its factorization.

633640252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6070 (or 6068 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 633640252 is about 25172.2119012216. The cubic root of 633640252 is about 858.9098554102.

Adding to 633640252 its reverse (252046336), we get a palindrome (885686588).

The spelling of 633640252 in words is "six hundred thirty-three million, six hundred forty thousand, two hundred fifty-two".