28793238 has 16 divisors (see below), whose sum is σ = 58146816. Its totient is φ = 9504360.

The previous prime is 28793213. The next prime is 28793243. The reversal of 28793238 is 83239782.

It is a self number, because there is not a number n which added to its sum of digits gives 28793238.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22678 + ... + 23913.

It is an arithmetic number, because the mean of its divisors is an integer number (3634176).

Almost surely, 2^28793238 is an apocalyptic number.

28793238 is an abundant number, since it is smaller than the sum of its proper divisors (29353578).

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

28793238 is a wasteful number, since it uses less digits than its factorization.

28793238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46699.

The product of its digits is 145152, while the sum is 42.

The square root of 28793238 is about 5365.9330968621. The cubic root of 28793238 is about 306.4997813371.

The spelling of 28793238 in words is "twenty-eight million, seven hundred ninety-three thousand, two hundred thirty-eight".