28206069 has 4 divisors (see below), whose sum is σ = 37608096. Its totient is φ = 18804044.

The previous prime is 28206047. The next prime is 28206083. The reversal of 28206069 is 96060282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28206069 - 2⁵ = 28206037 is a prime.

It is a super-2 number, since 2×28206069² = 1591164656865522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28206029) 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, 4701009 + ... + 4701014.

It is an arithmetic number, because the mean of its divisors is an integer number (9402024).

Almost surely, 2^28206069 is an apocalyptic number.

It is an amenable number.

28206069 is a deficient number, since it is larger than the sum of its proper divisors (9402027).

28206069 is an equidigital number, since it uses as much as digits as its factorization.

28206069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9402026.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 28206069 is about 5310.9386176080. The cubic root of 28206069 is about 304.4020138721.

The spelling of 28206069 in words is "twenty-eight million, two hundred six thousand, sixty-nine".