322940640 has 192 divisors, whose sum is σ = 1146120192. Its totient is φ = 75724800.

The previous prime is 322940627. The next prime is 322940669. The reversal of 322940640 is 46049223.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 322940598 and 322940607.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 162694 + ... + 164666.

It is an arithmetic number, because the mean of its divisors is an integer number (5969376).

Almost surely, 2^322940640 is an apocalyptic number.

322940640 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 322940640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (573060096).

322940640 is an abundant number, since it is smaller than the sum of its proper divisors (823179552).

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

322940640 is a wasteful number, since it uses less digits than its factorization.

322940640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2033 (or 2025 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 322940640 is about 17970.5492403543. The cubic root of 322940640 is about 686.0791698897.

Adding to 322940640 its reverse (46049223), we get a palindrome (368989863).

The spelling of 322940640 in words is "three hundred twenty-two million, nine hundred forty thousand, six hundred forty".