28045394 has 16 divisors (see below), whose sum is σ = 46410840. Its totient is φ = 12627840.

The previous prime is 28045379. The next prime is 28045403. The reversal of 28045394 is 49354082.

It can be written as a sum of positive squares in 4 ways, for example, as 5359225 + 22686169 = 2315^2 + 4763^2 .

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, 12089 + ... + 14220.

Almost surely, 2^28045394 is an apocalyptic number.

28045394 is a deficient number, since it is larger than the sum of its proper divisors (18365446).

28045394 is a wasteful number, since it uses less digits than its factorization.

28045394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26365.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 28045394 is about 5295.7902148782. The cubic root of 28045394 is about 303.8229073017.

The spelling of 28045394 in words is "twenty-eight million, forty-five thousand, three hundred ninety-four".