28383938 has 24 divisors (see below), whose sum is σ = 47702844. Its totient is φ = 12652640.

The previous prime is 28383919. The next prime is 28383973. The reversal of 28383938 is 83938382.

It can be written as a sum of positive squares in 2 ways, for example, as 22686169 + 5697769 = 4763^2 + 2387^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 11720 + ... + 13932.

Almost surely, 2^28383938 is an apocalyptic number.

28383938 is a deficient number, since it is larger than the sum of its proper divisors (19318906).

28383938 is a wasteful number, since it uses less digits than its factorization.

28383938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2290 (or 2279 counting only the distinct ones).

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

The square root of 28383938 is about 5327.6578343584. The cubic root of 28383938 is about 305.0405321033.

It can be divided in two parts, 2838 and 3938, that added together give a palindrome (6776).

The spelling of 28383938 in words is "twenty-eight million, three hundred eighty-three thousand, nine hundred thirty-eight".