28165207 has 16 divisors (see below), whose sum is σ = 33203520. Its totient is φ = 23392512.

The previous prime is 28165199. The next prime is 28165213. The reversal of 28165207 is 70256182.

It is a cyclic number.

It is not a de Polignac number, because 28165207 - 2³ = 28165199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28165217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32593 + ... + 33445.

It is an arithmetic number, because the mean of its divisors is an integer number (2075220).

Almost surely, 2^28165207 is an apocalyptic number.

28165207 is a deficient number, since it is larger than the sum of its proper divisors (5038313).

28165207 is an equidigital number, since it uses as much as digits as its factorization.

28165207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 28165207 is about 5307.0902573821. The cubic root of 28165207 is about 304.2549475741.

The spelling of 28165207 in words is "twenty-eight million, one hundred sixty-five thousand, two hundred seven".