28783233 has 12 divisors (see below), whose sum is σ = 43764240. Its totient is φ = 18178776.

The previous prime is 28783219. The next prime is 28783301. The reversal of 28783233 is 33238782.

It is not a de Polignac number, because 28783233 - 2⁴ = 28783217 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28783633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83991 + ... + 84332.

It is an arithmetic number, because the mean of its divisors is an integer number (3647020).

Almost surely, 2^28783233 is an apocalyptic number.

It is an amenable number.

28783233 is a deficient number, since it is larger than the sum of its proper divisors (14981007).

28783233 is a wasteful number, since it uses less digits than its factorization.

28783233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168348 (or 168345 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 28783233 is about 5365.0007455731. Note that the first 3 decimals coincide. The cubic root of 28783233 is about 306.4642766402.

The spelling of 28783233 in words is "twenty-eight million, seven hundred eighty-three thousand, two hundred thirty-three".