1664322 has 32 divisors (see below), whose sum is σ = 3677184. Its totient is φ = 498000.

The previous prime is 1664291. The next prime is 1664353. The reversal of 1664322 is 2234661.

It is an interprime number because it is at equal distance from previous prime (1664291) and next prime (1664353).

It is a junction number, because it is equal to n+sod(n) for n = 1664292 and 1664301.

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, 9883 + ... + 10049.

It is an arithmetic number, because the mean of its divisors is an integer number (114912).

2^1664322 is an apocalyptic number.

1664322 is an abundant number, since it is smaller than the sum of its proper divisors (2012862).

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

1664322 is a wasteful number, since it uses less digits than its factorization.

1664322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334.

The product of its digits is 1728, while the sum is 24.

The square root of 1664322 is about 1290.0860436421. The cubic root of 1664322 is about 118.5074858630.

Adding to 1664322 its reverse (2234661), we get a palindrome (3898983).

The spelling of 1664322 in words is "one million, six hundred sixty-four thousand, three hundred twenty-two".