13499728 has 60 divisors (see below), whose sum is σ = 30345280. Its totient is φ = 5797440.

The previous prime is 13499713. The next prime is 13499729. The reversal of 13499728 is 82799431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13499729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36601 + ... + 36967.

Almost surely, 2^13499728 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 13499728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15172640).

13499728 is an abundant number, since it is smaller than the sum of its proper divisors (16845552).

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

13499728 is a wasteful number, since it uses less digits than its factorization.

13499728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 399 counting only the distinct ones).

The product of its digits is 108864, while the sum is 43.

The square root of 13499728 is about 3674.1975994767. The cubic root of 13499728 is about 238.1085586249.

The spelling of 13499728 in words is "thirteen million, four hundred ninety-nine thousand, seven hundred twenty-eight".