1323311400 has 72 divisors (see below), whose sum is σ = 4444126830. Its totient is φ = 352882560.

The previous prime is 1323311389. The next prime is 1323311443. The reversal of 1323311400 is 41133231.

It can be written as a sum of positive squares in 3 ways, for example, as 1076758596 + 246552804 = 32814^2 + 15702^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×1323311400² = 3502306122739920000, which contains 22 as substring.

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

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 17 ways as a sum of consecutive naturals, for example, 365787 + ... + 369386.

Almost surely, 2^1323311400 is an apocalyptic number.

1323311400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1323311400 is an abundant number, since it is smaller than the sum of its proper divisors (3120815430).

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

1323311400 is a wasteful number, since it uses less digits than its factorization.

1323311400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735195 (or 735183 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1323311400 is about 36377.3473469411. The cubic root of 1323311400 is about 1097.8778368471.

Adding to 1323311400 its reverse (41133231), we get a palindrome (1364444631).

The spelling of 1323311400 in words is "one billion, three hundred twenty-three million, three hundred eleven thousand, four hundred".