28339130 has 16 divisors (see below), whose sum is σ = 51308424. Its totient is φ = 11269440.

The previous prime is 28339123. The next prime is 28339139. The reversal of 28339130 is 3193382.

It can be written as a sum of positive squares in 4 ways, for example, as 19018321 + 9320809 = 4361^2 + 3053^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28339093 and 28339102.

It is not an unprimeable number, because it can be changed into a prime (28339139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6461 + ... + 9920.

Almost surely, 2^28339130 is an apocalyptic number.

28339130 is a deficient number, since it is larger than the sum of its proper divisors (22969294).

28339130 is a wasteful number, since it uses less digits than its factorization.

28339130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16561.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 28339130 is about 5323.4509483980. The cubic root of 28339130 is about 304.8799312394.

The spelling of 28339130 in words is "twenty-eight million, three hundred thirty-nine thousand, one hundred thirty".