322636640 has 96 divisors (see below), whose sum is σ = 806936256. Its totient is φ = 121651200.

The previous prime is 322636619. The next prime is 322636651. The reversal of 322636640 is 46636223.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 322636597 and 322636606.

It is a congruent number.

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, 268040 + ... + 269240.

It is an arithmetic number, because the mean of its divisors is an integer number (8405586).

Almost surely, 2^322636640 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 322636640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (403468128).

322636640 is an abundant number, since it is smaller than the sum of its proper divisors (484299616).

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

322636640 is a wasteful number, since it uses less digits than its factorization.

322636640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312 (or 1304 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 32.

The square root of 322636640 is about 17962.0889653737. The cubic root of 322636640 is about 685.8638222156.

The spelling of 322636640 in words is "three hundred twenty-two million, six hundred thirty-six thousand, six hundred forty".