13805420 has 12 divisors (see below), whose sum is σ = 28991424. Its totient is φ = 5522160.

The previous prime is 13805401. The next prime is 13805431. The reversal of 13805420 is 2450831.

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, 345116 + ... + 345155.

It is an arithmetic number, because the mean of its divisors is an integer number (2415952).

Almost surely, 2^13805420 is an apocalyptic number.

13805420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13805420 is an abundant number, since it is smaller than the sum of its proper divisors (15186004).

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

13805420 is a wasteful number, since it uses less digits than its factorization.

13805420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690280 (or 690278 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 13805420 is about 3715.5645600635. The cubic root of 13805420 is about 239.8924286441.

The spelling of 13805420 in words is "thirteen million, eight hundred five thousand, four hundred twenty".