1323220146 has 32 divisors (see below), whose sum is σ = 2662502400. Its totient is φ = 438405120.

The previous prime is 1323220141. The next prime is 1323220163. The reversal of 1323220146 is 6410223231.

It is a super-2 number, since 2×1323220146² = 3501823109560522632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1323220141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1033935 + ... + 1035213.

It is an arithmetic number, because the mean of its divisors is an integer number (83203200).

Almost surely, 2^1323220146 is an apocalyptic number.

1323220146 is an abundant number, since it is smaller than the sum of its proper divisors (1339282254).

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

1323220146 is a wasteful number, since it uses less digits than its factorization.

1323220146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2194.

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

The square root of 1323220146 is about 36376.0930557420. The cubic root of 1323220146 is about 1097.8526001449.

Adding to 1323220146 its reverse (6410223231), we get a palindrome (7733443377).

The spelling of 1323220146 in words is "one billion, three hundred twenty-three million, two hundred twenty thousand, one hundred forty-six".