13885220 has 12 divisors (see below), whose sum is σ = 29159004. Its totient is φ = 5554080.

The previous prime is 13885213. The next prime is 13885253. The reversal of 13885220 is 2258831.

It can be written as a sum of positive squares in 2 ways, for example, as 6190144 + 7695076 = 2488^2 + 2774^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347111 + ... + 347150.

It is an arithmetic number, because the mean of its divisors is an integer number (2429917).

Almost surely, 2^13885220 is an apocalyptic number.

13885220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13885220 is an abundant number, since it is smaller than the sum of its proper divisors (15273784).

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

13885220 is a wasteful number, since it uses less digits than its factorization.

13885220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694270 (or 694268 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 13885220 is about 3726.2876968908. The cubic root of 13885220 is about 240.3537607069.

It can be divided in two parts, 138 and 85220, that added together give a palindrome (85358).

The spelling of 13885220 in words is "thirteen million, eight hundred eighty-five thousand, two hundred twenty".