1323299880 has 144 divisors (see below), whose sum is σ = 5002950420. Its totient is φ = 302464512.

The previous prime is 1323299867. The next prime is 1323299881. The reversal of 1323299880 is 889923231.

It can be written as a sum of positive squares in 2 ways, for example, as 1265509476 + 57790404 = 35574^2 + 7602^2 .

It is a super-2 number, since 2×1323299880² = 3502245144816028800, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (1323299881) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 19869 + ... + 55148.

Almost surely, 2^1323299880 is an apocalyptic number.

1323299880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1323299880 is an abundant number, since it is smaller than the sum of its proper divisors (3679650540).

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

1323299880 is a wasteful number, since it uses less digits than its factorization.

1323299880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75048 (or 75034 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 1323299880 is about 36377.1890062990. The cubic root of 1323299880 is about 1097.8746510035.

The spelling of 1323299880 in words is "one billion, three hundred twenty-three million, two hundred ninety-nine thousand, eight hundred eighty".