28160233 has 4 divisors (see below), whose sum is σ = 28556928. Its totient is φ = 27763540.

The previous prime is 28160221. The next prime is 28160239. The reversal of 28160233 is 33206182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28160233 is a prime.

It is a super-2 number, since 2×28160233² = 1585997445228578, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28160198 and 28160207.

It is not an unprimeable number, because it can be changed into a prime (28160239) 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, 198241 + ... + 198382.

It is an arithmetic number, because the mean of its divisors is an integer number (7139232).

Almost surely, 2^28160233 is an apocalyptic number.

It is an amenable number.

28160233 is a deficient number, since it is larger than the sum of its proper divisors (396695).

28160233 is an equidigital number, since it uses as much as digits as its factorization.

28160233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396694.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 28160233 is about 5306.6216183180. The cubic root of 28160233 is about 304.2370359570.

The spelling of 28160233 in words is "twenty-eight million, one hundred sixty thousand, two hundred thirty-three".