630402520 has 64 divisors (see below), whose sum is σ = 1628812800. Its totient is φ = 217169280.

The previous prime is 630402503. The next prime is 630402527. The reversal of 630402520 is 25204036.

It is a happy number.

630402520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 630402491 and 630402500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630402527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29344 + ... + 46063.

It is an arithmetic number, because the mean of its divisors is an integer number (25450200).

Almost surely, 2^630402520 is an apocalyptic number.

It is an amenable number.

630402520 is an abundant number, since it is smaller than the sum of its proper divisors (998410280).

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

630402520 is a wasteful number, since it uses less digits than its factorization.

630402520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75448 (or 75444 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 630402520 is about 25107.8179059830. The cubic root of 630402520 is about 857.4444234650. Note that the first 4 decimals are identical.

Adding to 630402520 its reverse (25204036), we get a palindrome (655606556).

The spelling of 630402520 in words is "six hundred thirty million, four hundred two thousand, five hundred twenty".