13885940 has 24 divisors (see below), whose sum is σ = 30876552. Its totient is φ = 5227520.

The previous prime is 13885931. The next prime is 13885943. The reversal of 13885940 is 4958831.

It can be written as a sum of positive squares in 4 ways, for example, as 6012304 + 7873636 = 2452^2 + 2806^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13885894 and 13885903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13885943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20081 + ... + 20760.

It is an arithmetic number, because the mean of its divisors is an integer number (1286523).

Almost surely, 2^13885940 is an apocalyptic number.

13885940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13885940 is an abundant number, since it is smaller than the sum of its proper divisors (16990612).

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

13885940 is a wasteful number, since it uses less digits than its factorization.

13885940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40867 (or 40865 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 13885940 is about 3726.3843065363. The cubic root of 13885940 is about 240.3579150455.

The spelling of 13885940 in words is "thirteen million, eight hundred eighty-five thousand, nine hundred forty".