28387433 has 16 divisors (see below), whose sum is σ = 31570560. Its totient is φ = 25401600.

The previous prime is 28387423. The next prime is 28387441. The reversal of 28387433 is 33478382.

It is a cyclic number.

It is not a de Polignac number, because 28387433 - 2¹⁸ = 28125289 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28387423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34598 + ... + 35408.

It is an arithmetic number, because the mean of its divisors is an integer number (1973160).

Almost surely, 2^28387433 is an apocalyptic number.

It is an amenable number.

28387433 is a deficient number, since it is larger than the sum of its proper divisors (3183127).

28387433 is a wasteful number, since it uses less digits than its factorization.

28387433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928.

The product of its digits is 96768, while the sum is 38.

The square root of 28387433 is about 5327.9858295607. The cubic root of 28387433 is about 305.0530517767.

The spelling of 28387433 in words is "twenty-eight million, three hundred eighty-seven thousand, four hundred thirty-three".