28767838 has 16 divisors (see below), whose sum is σ = 47318400. Its totient is φ = 13008600.

The previous prime is 28767829. The next prime is 28767839. The reversal of 28767838 is 83876782.

It is a junction number, because it is equal to n+sod(n) for n = 28767791 and 28767800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28767839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1093 + ... + 7663.

It is an arithmetic number, because the mean of its divisors is an integer number (2957400).

Almost surely, 2^28767838 is an apocalyptic number.

28767838 is a deficient number, since it is larger than the sum of its proper divisors (18550562).

28767838 is a wasteful number, since it uses less digits than its factorization.

28767838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6783.

The product of its digits is 903168, while the sum is 49.

The square root of 28767838 is about 5363.5657915234. The cubic root of 28767838 is about 306.4096284017.

The spelling of 28767838 in words is "twenty-eight million, seven hundred sixty-seven thousand, eight hundred thirty-eight".