630321032440 has 64 divisors (see below), whose sum is σ = 1614419112960. Its totient is φ = 219242094720.

The previous prime is 630321032431. The next prime is 630321032441. The reversal of 630321032440 is 44230123036.

It is a junction number, because it is equal to n+sod(n) for n = 630321032399 and 630321032408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630321032441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31132224 + ... + 31152463.

It is an arithmetic number, because the mean of its divisors is an integer number (25225298640).

Almost surely, 2^630321032440 is an apocalyptic number.

It is an amenable number.

630321032440 is an abundant number, since it is smaller than the sum of its proper divisors (984098080520).

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

630321032440 is a wasteful number, since it uses less digits than its factorization.

630321032440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62284732 (or 62284728 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 630321032440 its reverse (44230123036), we get a palindrome (674551155476).

The spelling of 630321032440 in words is "six hundred thirty billion, three hundred twenty-one million, thirty-two thousand, four hundred forty".