13099040 has 24 divisors (see below), whose sum is σ = 30946860. Its totient is φ = 5239552.

The previous prime is 13099013. The next prime is 13099057. The reversal of 13099040 is 4099031.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12988816 + 110224 = 3604^2 + 332^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40775 + ... + 41094.

Almost surely, 2^13099040 is an apocalyptic number.

13099040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13099040 is an abundant number, since it is smaller than the sum of its proper divisors (17847820).

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

13099040 is an equidigital number, since it uses as much as digits as its factorization.

13099040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81884 (or 81876 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 13099040 is about 3619.2595927897. The cubic root of 13099040 is about 235.7290772125.

Subtracting from 13099040 its reverse (4099031), we obtain a palindrome (9000009).

The spelling of 13099040 in words is "thirteen million, ninety-nine thousand, forty".