13204040 has 32 divisors (see below), whose sum is σ = 30051000. Its totient is φ = 5220864.

The previous prime is 13204007. The next prime is 13204043. The reversal of 13204040 is 4040231.

It can be written as a sum of positive squares in 4 ways, for example, as 7043716 + 6160324 = 2654^2 + 2482^2 .

13204040 is a modest number, since divided by 4040 gives 1320 as remainder.

It is not an unprimeable number, because it can be changed into a prime (13204043) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1706 + ... + 5414.

Almost surely, 2^13204040 is an apocalyptic number.

13204040 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 13204040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15025500).

13204040 is an abundant number, since it is smaller than the sum of its proper divisors (16846960).

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

13204040 is a wasteful number, since it uses less digits than its factorization.

13204040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3809 (or 3805 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 13204040 is about 3633.7363690835. The cubic root of 13204040 is about 236.3572583899.

Adding to 13204040 its reverse (4040231), we get a palindrome (17244271).

The spelling of 13204040 in words is "thirteen million, two hundred four thousand, forty".