28409383 has 4 divisors (see below), whose sum is σ = 28600200. Its totient is φ = 28218568.

The previous prime is 28409371. The next prime is 28409411. The reversal of 28409383 is 38390482.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28409383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28409333) 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, 95185 + ... + 95482.

It is an arithmetic number, because the mean of its divisors is an integer number (7150050).

Almost surely, 2^28409383 is an apocalyptic number.

28409383 is a deficient number, since it is larger than the sum of its proper divisors (190817).

28409383 is a wasteful number, since it uses less digits than its factorization.

28409383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190816.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 28409383 is about 5330.0453093759. The cubic root of 28409383 is about 305.1316568576.

The spelling of 28409383 in words is "twenty-eight million, four hundred nine thousand, three hundred eighty-three".