13216840 has 64 divisors (see below), whose sum is σ = 36610560. Its totient is φ = 4181760.

The previous prime is 13216831. The next prime is 13216843. The reversal of 13216840 is 4861231.

It is not an unprimeable number, because it can be changed into a prime (13216843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1825 + ... + 5455.

It is an arithmetic number, because the mean of its divisors is an integer number (572040).

Almost surely, 2^13216840 is an apocalyptic number.

13216840 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 13216840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18305280).

13216840 is an abundant number, since it is smaller than the sum of its proper divisors (23393720).

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

13216840 is a wasteful number, since it uses less digits than its factorization.

13216840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3662 (or 3658 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 13216840 is about 3635.4972149625. The cubic root of 13216840 is about 236.4336086542.

The spelling of 13216840 in words is "thirteen million, two hundred sixteen thousand, eight hundred forty".