28284933 has 16 divisors (see below), whose sum is σ = 38338560. Its totient is φ = 18546864.

The previous prime is 28284931. The next prime is 28284953. The reversal of 28284933 is 33948282.

It is not a de Polignac number, because 28284933 - 2¹ = 28284931 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28284891 and 28284900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28284931) 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, 73660 + ... + 74042.

It is an arithmetic number, because the mean of its divisors is an integer number (2396160).

Almost surely, 2^28284933 is an apocalyptic number.

It is an amenable number.

28284933 is a deficient number, since it is larger than the sum of its proper divisors (10053627).

28284933 is a wasteful number, since it uses less digits than its factorization.

28284933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728.

The product of its digits is 82944, while the sum is 39.

The square root of 28284933 is about 5318.3581112971. The cubic root of 28284933 is about 304.6854519415.

The spelling of 28284933 in words is "twenty-eight million, two hundred eighty-four thousand, nine hundred thirty-three".