322064640 has 144 divisors (see below), whose sum is σ = 1143004800. Its totient is φ = 85874688.

The previous prime is 322064629. The next prime is 322064663. The reversal of 322064640 is 46460223.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 29901 + ... + 39219.

Almost surely, 2^322064640 is an apocalyptic number.

322064640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 322064640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (571502400).

322064640 is an abundant number, since it is smaller than the sum of its proper divisors (820940160).

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

322064640 is an equidigital number, since it uses as much as digits as its factorization.

322064640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9349 (or 9329 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 322064640 is about 17946.1594777267. The cubic root of 322064640 is about 685.4582615634.

The spelling of 322064640 in words is "three hundred twenty-two million, sixty-four thousand, six hundred forty".