28055206 has 4 divisors (see below), whose sum is σ = 42082812. Its totient is φ = 14027602.

The previous prime is 28055201. The next prime is 28055231. The reversal of 28055206 is 60255082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60255082 = 2 ⋅30127541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28055201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7013800 + ... + 7013803.

It is an arithmetic number, because the mean of its divisors is an integer number (10520703).

Almost surely, 2^28055206 is an apocalyptic number.

28055206 is a deficient number, since it is larger than the sum of its proper divisors (14027606).

28055206 is a wasteful number, since it uses less digits than its factorization.

28055206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14027605.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 28055206 is about 5296.7165300779. The cubic root of 28055206 is about 303.8583351367.

The spelling of 28055206 in words is "twenty-eight million, fifty-five thousand, two hundred six".