28939233 has 8 divisors (see below), whose sum is σ = 38611296. Its totient is φ = 19280000.

The previous prime is 28939231. The next prime is 28939259. The reversal of 28939233 is 33293982.

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

It is a cyclic number.

It is not a de Polignac number, because 28939233 - 2¹ = 28939231 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28939191 and 28939200.

It is not an unprimeable number, because it can be changed into a prime (28939231) 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, 5233 + ... + 9233.

It is an arithmetic number, because the mean of its divisors is an integer number (4826412).

Almost surely, 2^28939233 is an apocalyptic number.

It is an amenable number.

28939233 is a deficient number, since it is larger than the sum of its proper divisors (9672063).

28939233 is a wasteful number, since it uses less digits than its factorization.

28939233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6415.

The product of its digits is 69984, while the sum is 39.

The square root of 28939233 is about 5379.5197741062. The cubic root of 28939233 is about 307.0169400054.

The spelling of 28939233 in words is "twenty-eight million, nine hundred thirty-nine thousand, two hundred thirty-three".