28039149 has 8 divisors (see below), whose sum is σ = 41539520. Its totient is φ = 18692748.

The previous prime is 28039129. The next prime is 28039153. The reversal of 28039149 is 94193082.

It is not a de Polignac number, because 28039149 - 2⁸ = 28038893 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 (28039129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 519217 + ... + 519270.

It is an arithmetic number, because the mean of its divisors is an integer number (5192440).

Almost surely, 2^28039149 is an apocalyptic number.

It is an amenable number.

28039149 is a deficient number, since it is larger than the sum of its proper divisors (13500371).

28039149 is a wasteful number, since it uses less digits than its factorization.

28039149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038496 (or 1038490 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 28039149 is about 5295.2005627738. The cubic root of 28039149 is about 303.8003544016.

The spelling of 28039149 in words is "twenty-eight million, thirty-nine thousand, one hundred forty-nine".