28066838 has 16 divisors (see below), whose sum is σ = 45846000. Its totient is φ = 12835872.

The previous prime is 28066793. The next prime is 28066879. The reversal of 28066838 is 83866082.

It is a junction number, because it is equal to n+sod(n) for n = 28066795 and 28066804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11633 + ... + 13836.

It is an arithmetic number, because the mean of its divisors is an integer number (2865375).

Almost surely, 2^28066838 is an apocalyptic number.

28066838 is a deficient number, since it is larger than the sum of its proper divisors (17779162).

28066838 is a wasteful number, since it uses less digits than its factorization.

28066838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25519.

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 28066838 is about 5297.8144550371. The cubic root of 28066838 is about 303.9003236811.

The spelling of 28066838 in words is "twenty-eight million, sixty-six thousand, eight hundred thirty-eight".