28389383 has 18 divisors (see below), whose sum is σ = 32887176. Its totient is φ = 24442000.

The previous prime is 28389379. The next prime is 28389391. The reversal of 28389383 is 38398382.

It is not a de Polignac number, because 28389383 - 2² = 28389379 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 (28389313) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 281033 + ... + 281133.

Almost surely, 2^28389383 is an apocalyptic number.

28389383 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

28389383 is a deficient number, since it is larger than the sum of its proper divisors (4497793).

28389383 is a wasteful number, since it uses less digits than its factorization.

28389383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 135 counting only the distinct ones).

The product of its digits is 248832, while the sum is 44.

The square root of 28389383 is about 5328.1688224004. The cubic root of 28389383 is about 305.0600365557.

It can be divided in two parts, 2838 and 9383, that added together give a palindrome (12221).

The spelling of 28389383 in words is "twenty-eight million, three hundred eighty-nine thousand, three hundred eighty-three".