13220140 has 24 divisors (see below), whose sum is σ = 27860112. Its totient is φ = 5269440.

The previous prime is 13220131. The next prime is 13220177. The reversal of 13220140 is 4102231.

13220140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 13220140.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5622 + ... + 7618.

It is an arithmetic number, because the mean of its divisors is an integer number (1160838).

Almost surely, 2^13220140 is an apocalyptic number.

13220140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13220140 is an abundant number, since it is smaller than the sum of its proper divisors (14639972).

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

13220140 is a wasteful number, since it uses less digits than its factorization.

13220140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2337 (or 2335 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 13220140 is about 3635.9510447749. The cubic root of 13220140 is about 236.4532847135.

Adding to 13220140 its reverse (4102231), we get a palindrome (17322371).

The spelling of 13220140 in words is "thirteen million, two hundred twenty thousand, one hundred forty".