28665433 has 4 divisors (see below), whose sum is σ = 30174160. Its totient is φ = 27156708.

The previous prime is 28665419. The next prime is 28665443. The reversal of 28665433 is 33456682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28665433 - 2⁵ = 28665401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28665392 and 28665401.

It is not an unprimeable number, because it can be changed into a prime (28665443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 754335 + ... + 754372.

It is an arithmetic number, because the mean of its divisors is an integer number (7543540).

Almost surely, 2^28665433 is an apocalyptic number.

It is an amenable number.

28665433 is a deficient number, since it is larger than the sum of its proper divisors (1508727).

28665433 is a wasteful number, since it uses less digits than its factorization.

28665433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1508726.

The product of its digits is 103680, while the sum is 37.

The square root of 28665433 is about 5354.0109263990. The cubic root of 28665433 is about 306.0456202364.

The spelling of 28665433 in words is "twenty-eight million, six hundred sixty-five thousand, four hundred thirty-three".