1323909900 has 144 divisors (see below), whose sum is σ = 4441382400. Its totient is φ = 337677120.

The previous prime is 1323909889. The next prime is 1323909907. The reversal of 1323909900 is 99093231.

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

It is not an unprimeable number, because it can be changed into a prime (1323909907) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51441 + ... + 72759.

Almost surely, 2^1323909900 is an apocalyptic number.

1323909900 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 1323909900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2220691200).

1323909900 is an abundant number, since it is smaller than the sum of its proper divisors (3117472500).

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

1323909900 is a wasteful number, since it uses less digits than its factorization.

1323909900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21365 (or 21352 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 36.

The square root of 1323909900 is about 36385.5726902848. The cubic root of 1323909900 is about 1098.0433259502.

The spelling of 1323909900 in words is "one billion, three hundred twenty-three million, nine hundred nine thousand, nine hundred".