633023440 has 80 divisors (see below), whose sum is σ = 1695070080. Its totient is φ = 215354880.

The previous prime is 633023423. The next prime is 633023473. The reversal of 633023440 is 44320336.

It is a tau number, because it is divible by the number of its divisors (80).

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, 69046 + ... + 77674.

It is an arithmetic number, because the mean of its divisors is an integer number (21188376).

Almost surely, 2^633023440 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 633023440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (847535040).

633023440 is an abundant number, since it is smaller than the sum of its proper divisors (1062046640).

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

633023440 is a wasteful number, since it uses less digits than its factorization.

633023440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8780 (or 8774 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 25.

The square root of 633023440 is about 25159.9570746852. The cubic root of 633023440 is about 858.6310653016.

Adding to 633023440 its reverse (44320336), we get a palindrome (677343776).

The spelling of 633023440 in words is "six hundred thirty-three million, twenty-three thousand, four hundred forty".