28106039 has 4 divisors (see below), whose sum is σ = 30268056. Its totient is φ = 25944024.

The previous prime is 28106027. The next prime is 28106077. The reversal of 28106039 is 93060182.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93060182 = 2 ⋅46530091.

It is a cyclic number.

It is not a de Polignac number, because 28106039 - 2⁸ = 28105783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28106009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1080989 + ... + 1081014.

It is an arithmetic number, because the mean of its divisors is an integer number (7567014).

Almost surely, 2^28106039 is an apocalyptic number.

28106039 is a deficient number, since it is larger than the sum of its proper divisors (2162017).

28106039 is a wasteful number, since it uses less digits than its factorization.

28106039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2162016.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 28106039 is about 5301.5128972775. The cubic root of 28106039 is about 304.0417438925.

The spelling of 28106039 in words is "twenty-eight million, one hundred six thousand, thirty-nine".