28030445 has 16 divisors (see below), whose sum is σ = 35603712. Its totient is φ = 21141120.

The previous prime is 28030439. The next prime is 28030447. The reversal of 28030445 is 54403082.

It is not a de Polignac number, because 28030445 - 2¹⁴ = 28014061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28030447) 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 15 ways as a sum of consecutive naturals, for example, 6449 + ... + 9881.

It is an arithmetic number, because the mean of its divisors is an integer number (2225232).

Almost surely, 2^28030445 is an apocalyptic number.

It is an amenable number.

28030445 is a deficient number, since it is larger than the sum of its proper divisors (7573267).

28030445 is a wasteful number, since it uses less digits than its factorization.

28030445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3532.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 28030445 is about 5294.3786226525. The cubic root of 28030445 is about 303.7689155974.

The spelling of 28030445 in words is "twenty-eight million, thirty thousand, four hundred forty-five".