28023206 has 4 divisors (see below), whose sum is σ = 42034812. Its totient is φ = 14011602.

The previous prime is 28023199. The next prime is 28023221. The reversal of 28023206 is 60232082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60232082 = 2 ⋅30116041.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7005800 + ... + 7005803.

It is an arithmetic number, because the mean of its divisors is an integer number (10508703).

Almost surely, 2^28023206 is an apocalyptic number.

28023206 is a deficient number, since it is larger than the sum of its proper divisors (14011606).

28023206 is a wasteful number, since it uses less digits than its factorization.

28023206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14011605.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 28023206 is about 5293.6949288753. The cubic root of 28023206 is about 303.7427634081.

Adding to 28023206 its reverse (60232082), we get a palindrome (88255288).

It can be divided in two parts, 2 and 8023206, that added together give a palindrome (8023208).

The spelling of 28023206 in words is "twenty-eight million, twenty-three thousand, two hundred six".