28378383 has 16 divisors (see below), whose sum is σ = 41404800. Its totient is φ = 17146080.

The previous prime is 28378331. The next prime is 28378393. The reversal of 28378383 is 38387382.

It is not a de Polignac number, because 28378383 - 2⁸ = 28378127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28378313) 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, 11373 + ... + 13641.

It is an arithmetic number, because the mean of its divisors is an integer number (2587800).

Almost surely, 2^28378383 is an apocalyptic number.

28378383 is a deficient number, since it is larger than the sum of its proper divisors (13026417).

28378383 is a wasteful number, since it uses less digits than its factorization.

28378383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2662.

The product of its digits is 193536, while the sum is 42.

The square root of 28378383 is about 5327.1364728154. The cubic root of 28378383 is about 305.0206310509.

The spelling of 28378383 in words is "twenty-eight million, three hundred seventy-eight thousand, three hundred eighty-three".