1323669690 has 96 divisors (see below), whose sum is σ = 3948212736. Its totient is φ = 301397760.

The previous prime is 1323669679. The next prime is 1323669701. The reversal of 1323669690 is 969663231.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1323669679) and next prime (1323669701).

It is a super-2 number, since 2×1323669690² = 3504202896449392200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 47 ways as a sum of consecutive naturals, for example, 166854 + ... + 174606.

It is an arithmetic number, because the mean of its divisors is an integer number (41127216).

Almost surely, 2^1323669690 is an apocalyptic number.

1323669690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1323669690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1974106368).

1323669690 is an abundant number, since it is smaller than the sum of its proper divisors (2624543046).

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

1323669690 is a wasteful number, since it uses less digits than its factorization.

1323669690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8044 (or 8041 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 45.

The square root of 1323669690 is about 36382.2716443050. The cubic root of 1323669690 is about 1097.9769123317.

The spelling of 1323669690 in words is "one billion, three hundred twenty-three million, six hundred sixty-nine thousand, six hundred ninety".