13278216 has 64 divisors (see below), whose sum is σ = 38736000. Its totient is φ = 3791424.

The previous prime is 13278163. The next prime is 13278217. The reversal of 13278216 is 61287231.

It is a super-2 number, since 2×13278216² = 352622040285312, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13278217) 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, 7426 + ... + 9038.

It is an arithmetic number, because the mean of its divisors is an integer number (605250).

Almost surely, 2^13278216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13278216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19368000).

13278216 is an abundant number, since it is smaller than the sum of its proper divisors (25457784).

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

13278216 is a wasteful number, since it uses less digits than its factorization.

13278216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643 (or 1625 counting only the distinct ones).

The product of its digits is 4032, while the sum is 30.

The square root of 13278216 is about 3643.9286491368. The cubic root of 13278216 is about 236.7990249077.

The spelling of 13278216 in words is "thirteen million, two hundred seventy-eight thousand, two hundred sixteen".