13671320 has 64 divisors (see below), whose sum is σ = 33747840. Its totient is φ = 4953600.

The previous prime is 13671319. The next prime is 13671347. The reversal of 13671320 is 2317631.

It is a happy number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 31505 + ... + 31935.

It is an arithmetic number, because the mean of its divisors is an integer number (527310).

Almost surely, 2^13671320 is an apocalyptic number.

13671320 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 13671320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16873920).

13671320 is an abundant number, since it is smaller than the sum of its proper divisors (20076520).

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

13671320 is a wasteful number, since it uses less digits than its factorization.

13671320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516 (or 512 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 13671320 is about 3697.4748139778. The cubic root of 13671320 is about 239.1131622163.

Adding to 13671320 its reverse (2317631), we get a palindrome (15988951).

The spelling of 13671320 in words is "thirteen million, six hundred seventy-one thousand, three hundred twenty".