13309380 has 144 divisors (see below), whose sum is σ = 48263040. Its totient is φ = 3036096.

The previous prime is 13309369. The next prime is 13309393. The reversal of 13309380 is 8390331.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 47 ways as a sum of consecutive naturals, for example, 26209 + ... + 26711.

It is an arithmetic number, because the mean of its divisors is an integer number (335160).

Almost surely, 2^13309380 is an apocalyptic number.

13309380 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 13309380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24131520).

13309380 is an abundant number, since it is smaller than the sum of its proper divisors (34953660).

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

13309380 is a wasteful number, since it uses less digits than its factorization.

13309380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535 (or 520 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 13309380 is about 3648.2022970225. The cubic root of 13309380 is about 236.9841360957.

It can be divided in two parts, 13309 and 380, that added together give a square (13689 = 117²).

The spelling of 13309380 in words is "thirteen million, three hundred nine thousand, three hundred eighty".