13809490 has 8 divisors (see below), whose sum is σ = 24857100. Its totient is φ = 5523792.

The previous prime is 13809487. The next prime is 13809517. The reversal of 13809490 is 9490831.

It can be written as a sum of positive squares in 2 ways, for example, as 12552849 + 1256641 = 3543^2 + 1121^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 690465 + ... + 690484.

Almost surely, 2^13809490 is an apocalyptic number.

13809490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13809490 is a deficient number, since it is larger than the sum of its proper divisors (11047610).

13809490 is a wasteful number, since it uses less digits than its factorization.

13809490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380956.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 13809490 is about 3716.1122157438. The cubic root of 13809490 is about 239.9160006965.

The spelling of 13809490 in words is "thirteen million, eight hundred nine thousand, four hundred ninety".