13398220 has 24 divisors (see below), whose sum is σ = 30694608. Its totient is φ = 4872000.

The previous prime is 13398157. The next prime is 13398233. The reversal of 13398220 is 2289331.

It is a zygodrome in base 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30231 + ... + 30670.

It is an arithmetic number, because the mean of its divisors is an integer number (1278942).

Almost surely, 2^13398220 is an apocalyptic number.

13398220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13398220 is an abundant number, since it is smaller than the sum of its proper divisors (17296388).

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

13398220 is a wasteful number, since it uses less digits than its factorization.

13398220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60921 (or 60919 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 13398220 is about 3660.3579059977. The cubic root of 13398220 is about 237.5102562515.

Subtracting from 13398220 its reverse (2289331), we obtain a square (11108889 = 3333²).

It can be divided in two parts, 1339 and 8220, that added together give a palindrome (9559).

The spelling of 13398220 in words is "thirteen million, three hundred ninety-eight thousand, two hundred twenty".