28206807 has 8 divisors (see below), whose sum is σ = 38822400. Its totient is φ = 18197880.

The previous prime is 28206797. The next prime is 28206877. The reversal of 28206807 is 70860282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28206807 - 2⁸ = 28206551 is a prime.

It is a super-2 number, since 2×28206807² = 1591247922270498, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28206877) 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, 151557 + ... + 151742.

It is an arithmetic number, because the mean of its divisors is an integer number (4852800).

Almost surely, 2^28206807 is an apocalyptic number.

28206807 is a deficient number, since it is larger than the sum of its proper divisors (10615593).

28206807 is a wasteful number, since it uses less digits than its factorization.

28206807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303333.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 28206807 is about 5311.0080963975. The cubic root of 28206807 is about 304.4046686994.

The spelling of 28206807 in words is "twenty-eight million, two hundred six thousand, eight hundred seven".