13404220 has 12 divisors (see below), whose sum is σ = 28148904. Its totient is φ = 5361680.

The previous prime is 13404169. The next prime is 13404233. The reversal of 13404220 is 2240431.

It is a super-2 number, since 2×13404220² = 359346227616800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13404194 and 13404203.

It is a congruent number.

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, 335086 + ... + 335125.

It is an arithmetic number, because the mean of its divisors is an integer number (2345742).

Almost surely, 2^13404220 is an apocalyptic number.

13404220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13404220 is an abundant number, since it is smaller than the sum of its proper divisors (14744684).

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

13404220 is a wasteful number, since it uses less digits than its factorization.

13404220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670220 (or 670218 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 13404220 is about 3661.1774062452. The cubic root of 13404220 is about 237.5457049620.

Adding to 13404220 its reverse (2240431), we get a palindrome (15644651).

The spelling of 13404220 in words is "thirteen million, four hundred four thousand, two hundred twenty".