28294233 has 16 divisors (see below), whose sum is σ = 42269376. Its totient is φ = 16683840.

The previous prime is 28294219. The next prime is 28294237. The reversal of 28294233 is 33249282.

It is not a de Polignac number, because 28294233 - 2⁹ = 28293721 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 28294194 and 28294203.

It is not an unprimeable number, because it can be changed into a prime (28294237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10366 + ... + 12807.

It is an arithmetic number, because the mean of its divisors is an integer number (2641836).

Almost surely, 2^28294233 is an apocalyptic number.

It is an amenable number.

28294233 is a deficient number, since it is larger than the sum of its proper divisors (13975143).

28294233 is a wasteful number, since it uses less digits than its factorization.

28294233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23224.

The product of its digits is 20736, while the sum is 33.

The square root of 28294233 is about 5319.2323694308. The cubic root of 28294233 is about 304.7188414992.

The spelling of 28294233 in words is "twenty-eight million, two hundred ninety-four thousand, two hundred thirty-three".