13820544 has 160 divisors (see below), whose sum is σ = 43443840. Its totient is φ = 4354560.

The previous prime is 13820531. The next prime is 13820551. The reversal of 13820544 is 44502831.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 321387 + ... + 321429.

It is an arithmetic number, because the mean of its divisors is an integer number (271524).

Almost surely, 2^13820544 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 13820544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21721920).

13820544 is an abundant number, since it is smaller than the sum of its proper divisors (29623296).

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

13820544 is an equidigital number, since it uses as much as digits as its factorization.

13820544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 13820544 is about 3717.5992253066. The cubic root of 13820544 is about 239.9799983331.

The spelling of 13820544 in words is "thirteen million, eight hundred twenty thousand, five hundred forty-four".