13390220 has 24 divisors (see below), whose sum is σ = 29774304. Its totient is φ = 5040896.

The previous prime is 13390219. The next prime is 13390241. The reversal of 13390220 is 2209331.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 13390192 and 13390201.

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, 19352 + ... + 20031.

It is an arithmetic number, because the mean of its divisors is an integer number (1240596).

Almost surely, 2^13390220 is an apocalyptic number.

13390220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13390220 is an abundant number, since it is smaller than the sum of its proper divisors (16384084).

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

13390220 is a wasteful number, since it uses less digits than its factorization.

13390220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39409 (or 39407 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 13390220 is about 3659.2649535118. The cubic root of 13390220 is about 237.4629748377.

Adding to 13390220 its reverse (2209331), we get a palindrome (15599551).

The spelling of 13390220 in words is "thirteen million, three hundred ninety thousand, two hundred twenty".