13809546 has 24 divisors (see below), whose sum is σ = 30413604. Its totient is φ = 4527360.

The previous prime is 13809533. The next prime is 13809553. The reversal of 13809546 is 64590831.

It can be written as a sum of positive squares in 2 ways, for example, as 13771521 + 38025 = 3711^2 + 195^2 .

It is a super-2 number, since 2×13809546² = 381407121452232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13809546.

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 11 ways as a sum of consecutive naturals, for example, 5191 + ... + 7386.

Almost surely, 2^13809546 is an apocalyptic number.

13809546 is an abundant number, since it is smaller than the sum of its proper divisors (16604058).

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

13809546 is a wasteful number, since it uses less digits than its factorization.

13809546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12646 (or 12643 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 13809546 is about 3716.1197504924. The cubic root of 13809546 is about 239.9163249971.

The spelling of 13809546 in words is "thirteen million, eight hundred nine thousand, five hundred forty-six".