28751383 has 4 divisors (see below), whose sum is σ = 29742840. Its totient is φ = 27759928.

The previous prime is 28751347. The next prime is 28751399. The reversal of 28751383 is 38315782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38315782 = 2 ⋅19157891.

It is a cyclic number.

It is not a de Polignac number, because 28751383 - 2¹⁷ = 28620311 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28751323) 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, 495685 + ... + 495742.

It is an arithmetic number, because the mean of its divisors is an integer number (7435710).

Almost surely, 2^28751383 is an apocalyptic number.

28751383 is a deficient number, since it is larger than the sum of its proper divisors (991457).

28751383 is an equidigital number, since it uses as much as digits as its factorization.

28751383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991456.

The product of its digits is 40320, while the sum is 37.

The square root of 28751383 is about 5362.0316112459. The cubic root of 28751383 is about 306.3511958787.

The spelling of 28751383 in words is "twenty-eight million, seven hundred fifty-one thousand, three hundred eighty-three".