322442640 has 160 divisors (see below), whose sum is σ = 1196173440. Its totient is φ = 79363584.

The previous prime is 322442599. The next prime is 322442663. The reversal of 322442640 is 46244223.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22339 + ... + 33821.

It is an arithmetic number, because the mean of its divisors is an integer number (7476084).

Almost surely, 2^322442640 is an apocalyptic number.

322442640 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 322442640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (598086720).

322442640 is an abundant number, since it is smaller than the sum of its proper divisors (873730800).

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

322442640 is a wasteful number, since it uses less digits than its factorization.

322442640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11518 (or 11506 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 322442640 is about 17956.6878905883. The cubic root of 322442640 is about 685.7263256815.

Adding to 322442640 its reverse (46244223), we get a palindrome (368686863).

The spelling of 322442640 in words is "three hundred twenty-two million, four hundred forty-two thousand, six hundred forty".