28026394 has 16 divisors (see below), whose sum is σ = 46069920. Its totient is φ = 12681360.

The previous prime is 28026377. The next prime is 28026437. The reversal of 28026394 is 49362082.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2257 + ... + 7819.

It is an arithmetic number, because the mean of its divisors is an integer number (2879370).

Almost surely, 2^28026394 is an apocalyptic number.

28026394 is a deficient number, since it is larger than the sum of its proper divisors (18043526).

28026394 is a wasteful number, since it uses less digits than its factorization.

28026394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5805.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 28026394 is about 5293.9960332437. The cubic root of 28026394 is about 303.7542811863.

The spelling of 28026394 in words is "twenty-eight million, twenty-six thousand, three hundred ninety-four".