13379220 has 72 divisors (see below), whose sum is σ = 40884480. Its totient is φ = 3541440.

The previous prime is 13379213. The next prime is 13379227. The reversal of 13379220 is 2297331.

13379220 = T₃₇₆ + T₃₇₇ + ... + T₅₁₀.

It is an interprime number because it is at equal distance from previous prime (13379213) and next prime (13379227).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13379227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42865 + ... + 43175.

It is an arithmetic number, because the mean of its divisors is an integer number (567840).

Almost surely, 2^13379220 is an apocalyptic number.

13379220 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 13379220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20442240).

13379220 is an abundant number, since it is smaller than the sum of its proper divisors (27505260).

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

13379220 is a wasteful number, since it uses less digits than its factorization.

13379220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565 (or 560 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 13379220 is about 3657.7616106029. The cubic root of 13379220 is about 237.3979321343.

The spelling of 13379220 in words is "thirteen million, three hundred seventy-nine thousand, two hundred twenty".