28026886 has 4 divisors (see below), whose sum is σ = 42040332. Its totient is φ = 14013442.

The previous prime is 28026853. The next prime is 28026893. The reversal of 28026886 is 68862082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68862082 = 2 ⋅34431041.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 7006720 + ... + 7006723.

It is an arithmetic number, because the mean of its divisors is an integer number (10510083).

Almost surely, 2^28026886 is an apocalyptic number.

28026886 is a deficient number, since it is larger than the sum of its proper divisors (14013446).

28026886 is a wasteful number, since it uses less digits than its factorization.

28026886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14013445.

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 28026886 is about 5294.0425007739. The cubic root of 28026886 is about 303.7560586326.

The spelling of 28026886 in words is "twenty-eight million, twenty-six thousand, eight hundred eighty-six".