28910233 has 8 divisors (see below), whose sum is σ = 32272416. Its totient is φ = 25670400.

The previous prime is 28910227. The next prime is 28910239. The reversal of 28910233 is 33201982.

It is an interprime number because it is at equal distance from previous prime (28910227) and next prime (28910239).

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 28910233 - 2⁵ = 28910201 is a prime.

It is a super-2 number, since 2×28910233² = 1671603144228578, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28910239) 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, 30088 + ... + 31033.

It is an arithmetic number, because the mean of its divisors is an integer number (4034052).

Almost surely, 2^28910233 is an apocalyptic number.

It is an amenable number.

28910233 is a deficient number, since it is larger than the sum of its proper divisors (3362183).

28910233 is a wasteful number, since it uses less digits than its factorization.

28910233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61175.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 28910233 is about 5376.8236906188. The cubic root of 28910233 is about 306.9143518571.

The spelling of 28910233 in words is "twenty-eight million, nine hundred ten thousand, two hundred thirty-three".