28954239 has 8 divisors (see below), whose sum is σ = 39649200. Its totient is φ = 18781056.

The previous prime is 28954231. The next prime is 28954243. The reversal of 28954239 is 93245982.

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

It is not a de Polignac number, because 28954239 - 2³ = 28954231 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 28954239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28954231) 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, 130314 + ... + 130535.

It is an arithmetic number, because the mean of its divisors is an integer number (4956150).

Almost surely, 2^28954239 is an apocalyptic number.

28954239 is a deficient number, since it is larger than the sum of its proper divisors (10694961).

28954239 is a wasteful number, since it uses less digits than its factorization.

28954239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260889.

The product of its digits is 155520, while the sum is 42.

The square root of 28954239 is about 5380.9143275098. The cubic root of 28954239 is about 307.0699971604.

The spelling of 28954239 in words is "twenty-eight million, nine hundred fifty-four thousand, two hundred thirty-nine".