13178220 has 96 divisors (see below), whose sum is σ = 41319936. Its totient is φ = 3110400.

The previous prime is 13178201. The next prime is 13178279. The reversal of 13178220 is 2287131.

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 31 ways as a sum of consecutive naturals, for example, 26817 + ... + 27303.

It is an arithmetic number, because the mean of its divisors is an integer number (430416).

Almost surely, 2^13178220 is an apocalyptic number.

13178220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13178220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20659968).

13178220 is an abundant number, since it is smaller than the sum of its proper divisors (28141716).

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

13178220 is a wasteful number, since it uses less digits than its factorization.

13178220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551 (or 549 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 13178220 is about 3630.1818136286. The cubic root of 13178220 is about 236.2030953046.

The spelling of 13178220 in words is "thirteen million, one hundred seventy-eight thousand, two hundred twenty".