28647933 has 16 divisors (see below), whose sum is σ = 39395136. Its totient is φ = 18506880.

The previous prime is 28647929. The next prime is 28647961. The reversal of 28647933 is 33974682.

It is not a de Polignac number, because 28647933 - 2² = 28647929 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28647133) 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, 16863 + ... + 18483.

It is an arithmetic number, because the mean of its divisors is an integer number (2462196).

Almost surely, 2^28647933 is an apocalyptic number.

It is an amenable number.

28647933 is a deficient number, since it is larger than the sum of its proper divisors (10747203).

28647933 is a wasteful number, since it uses less digits than its factorization.

28647933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804.

The product of its digits is 217728, while the sum is 42.

The square root of 28647933 is about 5352.3763881102. The cubic root of 28647933 is about 305.9833281532.

The spelling of 28647933 in words is "twenty-eight million, six hundred forty-seven thousand, nine hundred thirty-three".