28533393 has 24 divisors (see below), whose sum is σ = 47285888. Its totient is φ = 16241472.

The previous prime is 28533389. The next prime is 28533433. The reversal of 28533393 is 39333582.

It is not a de Polignac number, because 28533393 - 2² = 28533389 is a prime.

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

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28533793) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18996 + ... + 20442.

Almost surely, 2^28533393 is an apocalyptic number.

It is an amenable number.

28533393 is a deficient number, since it is larger than the sum of its proper divisors (18752495).

28533393 is a wasteful number, since it uses less digits than its factorization.

28533393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1773 (or 1770 counting only the distinct ones).

The product of its digits is 58320, while the sum is 36.

The square root of 28533393 is about 5341.6657514300. The cubic root of 28533393 is about 305.5749898726.

The spelling of 28533393 in words is "twenty-eight million, five hundred thirty-three thousand, three hundred ninety-three".