1323905040 has 160 divisors (see below), whose sum is σ = 4585420800. Its totient is φ = 351083520.

The previous prime is 1323904997. The next prime is 1323905069. The reversal of 1323905040 is 405093231.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1323904995 and 1323905013.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 410956 + ... + 414164.

It is an arithmetic number, because the mean of its divisors is an integer number (28658880).

Almost surely, 2^1323905040 is an apocalyptic number.

1323905040 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 1323905040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2292710400).

1323905040 is an abundant number, since it is smaller than the sum of its proper divisors (3261515760).

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

1323905040 is a wasteful number, since it uses less digits than its factorization.

1323905040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3422 (or 3410 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 1323905040 is about 36385.5059055113. The cubic root of 1323905040 is about 1098.0419823298.

Adding to 1323905040 its reverse (405093231), we get a palindrome (1728998271).

The spelling of 1323905040 in words is "one billion, three hundred twenty-three million, nine hundred five thousand, forty".