1323122040 has 160 divisors (see below), whose sum is σ = 4551061680. Its totient is φ = 344590848.

The previous prime is 1323122039. The next prime is 1323122041. The reversal of 1323122040 is 402213231.

It is an interprime number because it is at equal distance from previous prime (1323122039) and next prime (1323122041).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323122041) 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 39 ways as a sum of consecutive naturals, for example, 134572 + ... + 144068.

Almost surely, 2^1323122040 is an apocalyptic number.

1323122040 is a gapful number since it is divisible by the number (10) 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 1323122040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2275530840).

1323122040 is an abundant number, since it is smaller than the sum of its proper divisors (3227939640).

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

1323122040 is a wasteful number, since it uses less digits than its factorization.

1323122040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9563 (or 9550 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1323122040 is about 36374.7445351854. The cubic root of 1323122040 is about 1097.8254671972.

Adding to 1323122040 its reverse (402213231), we get a palindrome (1725335271).

The spelling of 1323122040 in words is "one billion, three hundred twenty-three million, one hundred twenty-two thousand, forty".