28017235 has 4 divisors (see below), whose sum is σ = 33620688. Its totient is φ = 22413784.

The previous prime is 28017233. The next prime is 28017263. The reversal of 28017235 is 53271082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28017235 - 2¹ = 28017233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28017233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2801719 + ... + 2801728.

It is an arithmetic number, because the mean of its divisors is an integer number (8405172).

Almost surely, 2^28017235 is an apocalyptic number.

28017235 is a deficient number, since it is larger than the sum of its proper divisors (5603453).

28017235 is an equidigital number, since it uses as much as digits as its factorization.

28017235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5603452.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 28017235 is about 5293.1309260210. The cubic root of 28017235 is about 303.7211887072.

The spelling of 28017235 in words is "twenty-eight million, seventeen thousand, two hundred thirty-five".