1323364644 has 72 divisors (see below), whose sum is σ = 3926406848. Its totient is φ = 367882560.

The previous prime is 1323364577. The next prime is 1323364663. The reversal of 1323364644 is 4464633231.

1323364644 is a `hidden beast` number, since 1 + 3 + 2 + 3 + 3 + 6 + 4 + 644 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1323364599 and 1323364608.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61642 + ... + 80289.

Almost surely, 2^1323364644 is an apocalyptic number.

1323364644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1323364644 is an abundant number, since it is smaller than the sum of its proper divisors (2603042204).

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

1323364644 is a wasteful number, since it uses less digits than its factorization.

1323364644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141985 (or 141980 counting only the distinct ones).

The product of its digits is 124416, while the sum is 36.

The square root of 1323364644 is about 36378.0791686422. The cubic root of 1323364644 is about 1097.8925611777.

Adding to 1323364644 its reverse (4464633231), we get a palindrome (5787997875).

It can be divided in two parts, 13233 and 64644, that added together give a palindrome (77877).

The spelling of 1323364644 in words is "one billion, three hundred twenty-three million, three hundred sixty-four thousand, six hundred forty-four".