630322440 has 64 divisors (see below), whose sum is σ = 2062877760. Its totient is φ = 152805120.

The previous prime is 630322439. The next prime is 630322457. The reversal of 630322440 is 44223036.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 630322440.

It is an unprimeable number.

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, 237439 + ... + 240078.

It is an arithmetic number, because the mean of its divisors is an integer number (32232465).

Almost surely, 2^630322440 is an apocalyptic number.

630322440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

630322440 is an abundant number, since it is smaller than the sum of its proper divisors (1432555320).

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

630322440 is a wasteful number, since it uses less digits than its factorization.

630322440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477542 (or 477538 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 630322440 is about 25106.2231329207. The cubic root of 630322440 is about 857.4081148870.

Adding to 630322440 its reverse (44223036), we get a palindrome (674545476).

The spelling of 630322440 in words is "six hundred thirty million, three hundred twenty-two thousand, four hundred forty".