28239274 has 16 divisors (see below), whose sum is σ = 48500928. Its totient is φ = 12079872.

The previous prime is 28239271. The next prime is 28239287. The reversal of 28239274 is 47293282.

It is not an unprimeable number, because it can be changed into a prime (28239271) 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, 7434 + ... + 10570.

It is an arithmetic number, because the mean of its divisors is an integer number (3031308).

Almost surely, 2^28239274 is an apocalyptic number.

28239274 is a deficient number, since it is larger than the sum of its proper divisors (20261654).

28239274 is a wasteful number, since it uses less digits than its factorization.

28239274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3789.

The product of its digits is 48384, while the sum is 37.

The square root of 28239274 is about 5314.0637933694. The cubic root of 28239274 is about 304.5214173134.

The spelling of 28239274 in words is "twenty-eight million, two hundred thirty-nine thousand, two hundred seventy-four".