28123233 has 8 divisors (see below), whose sum is σ = 37574208. Its totient is φ = 18710544.

The previous prime is 28123229. The next prime is 28123241. The reversal of 28123233 is 33232182.

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

It is not a de Polignac number, because 28123233 - 2² = 28123229 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28123213) 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, 7810 + ... + 10827.

It is an arithmetic number, because the mean of its divisors is an integer number (4696776).

Almost surely, 2^28123233 is an apocalyptic number.

It is an amenable number.

28123233 is a deficient number, since it is larger than the sum of its proper divisors (9450975).

28123233 is a wasteful number, since it uses less digits than its factorization.

28123233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19143.

The product of its digits is 1728, while the sum is 24.

The square root of 28123233 is about 5303.1342619247. The cubic root of 28123233 is about 304.1037309040.

The spelling of 28123233 in words is "twenty-eight million, one hundred twenty-three thousand, two hundred thirty-three".