13216280 has 96 divisors (see below), whose sum is σ = 37797840. Its totient is φ = 4112640.

The previous prime is 13216249. The next prime is 13216303. The reversal of 13216280 is 8261231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21254 + ... + 21866.

Almost surely, 2^13216280 is an apocalyptic number.

13216280 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 13216280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18898920).

13216280 is an abundant number, since it is smaller than the sum of its proper divisors (24581560).

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

13216280 is a wasteful number, since it uses less digits than its factorization.

13216280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649 (or 638 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 13216280 is about 3635.4201957958. The cubic root of 13216280 is about 236.4302693616.

The spelling of 13216280 in words is "thirteen million, two hundred sixteen thousand, two hundred eighty".