13400220 has 24 divisors (see below), whose sum is σ = 37520784. Its totient is φ = 3573376.

The previous prime is 13400209. The next prime is 13400227. The reversal of 13400220 is 2200431.

13400220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 13400196 and 13400205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13400227) 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, 111609 + ... + 111728.

It is an arithmetic number, because the mean of its divisors is an integer number (1563366).

Almost surely, 2^13400220 is an apocalyptic number.

13400220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13400220 is an abundant number, since it is smaller than the sum of its proper divisors (24120564).

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

13400220 is a wasteful number, since it uses less digits than its factorization.

13400220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223349 (or 223347 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 13400220 is about 3660.6310931313. The cubic root of 13400220 is about 237.5220736640.

Adding to 13400220 its reverse (2200431), we get a palindrome (15600651).

The spelling of 13400220 in words is "thirteen million, four hundred thousand, two hundred twenty".