10809405 has 12 divisors (see below), whose sum is σ = 18736380. Its totient is φ = 5764992.

The previous prime is 10809401. The next prime is 10809413. The reversal of 10809405 is 50490801.

10809405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1205604 + 9603801 = 1098^2 + 3099^2 .

It is not a de Polignac number, because 10809405 - 2² = 10809401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10809401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120060 + ... + 120149.

It is an arithmetic number, because the mean of its divisors is an integer number (1561365).

Almost surely, 2^10809405 is an apocalyptic number.

10809405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10809405 is a deficient number, since it is larger than the sum of its proper divisors (7926975).

10809405 is a wasteful number, since it uses less digits than its factorization.

10809405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240220 (or 240217 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 10809405 is about 3287.7659588237. The cubic root of 10809405 is about 221.1060348508.

The spelling of 10809405 in words is "ten million, eight hundred nine thousand, four hundred five".