13228730 has 8 divisors (see below), whose sum is σ = 23811732. Its totient is φ = 5291488.

The previous prime is 13228717. The next prime is 13228741. The reversal of 13228730 is 3782231.

It can be written as a sum of positive squares in 2 ways, for example, as 13227769 + 961 = 3637^2 + 31^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 13228730.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 661427 + ... + 661446.

Almost surely, 2^13228730 is an apocalyptic number.

13228730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13228730 is a deficient number, since it is larger than the sum of its proper divisors (10583002).

13228730 is a wasteful number, since it uses less digits than its factorization.

13228730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322880.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 13228730 is about 3637.1321119805. The cubic root of 13228730 is about 236.5044867419.

The spelling of 13228730 in words is "thirteen million, two hundred twenty-eight thousand, seven hundred thirty".