13471728 has 80 divisors (see below), whose sum is σ = 36533376. Its totient is φ = 4273920.

The previous prime is 13471727. The next prime is 13471729. The reversal of 13471728 is 82717431.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13471727) and next prime (13471729).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13471727) 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, 125851 + ... + 125957.

Almost surely, 2^13471728 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 13471728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18266688).

13471728 is an abundant number, since it is smaller than the sum of its proper divisors (23061648).

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

13471728 is a wasteful number, since it uses less digits than its factorization.

13471728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 216 counting only the distinct ones).

The product of its digits is 9408, while the sum is 33.

The square root of 13471728 is about 3670.3852658815. The cubic root of 13471728 is about 237.9438230993.

The spelling of 13471728 in words is "thirteen million, four hundred seventy-one thousand, seven hundred twenty-eight".