13805428 has 96 divisors (see below), whose sum is σ = 33191424. Its totient is φ = 4866048.

The previous prime is 13805401. The next prime is 13805431. The reversal of 13805428 is 82450831.

It is a self number, because there is not a number n which added to its sum of digits gives 13805428.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 142276 + ... + 142372.

It is an arithmetic number, because the mean of its divisors is an integer number (345744).

Almost surely, 2^13805428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13805428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16595712).

13805428 is an abundant number, since it is smaller than the sum of its proper divisors (19385996).

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

13805428 is a wasteful number, since it uses less digits than its factorization.

13805428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 159 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 13805428 is about 3715.5656366158. The cubic root of 13805428 is about 239.8924749819.

The spelling of 13805428 in words is "thirteen million, eight hundred five thousand, four hundred twenty-eight".