28207245 has 16 divisors (see below), whose sum is σ = 49234752. Its totient is φ = 13676160.

The previous prime is 28207243. The next prime is 28207261. The reversal of 28207245 is 54270282.

It is not a de Polignac number, because 28207245 - 2¹ = 28207243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28207243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85312 + ... + 85641.

It is an arithmetic number, because the mean of its divisors is an integer number (3077172).

Almost surely, 2^28207245 is an apocalyptic number.

It is an amenable number.

28207245 is a deficient number, since it is larger than the sum of its proper divisors (21027507).

28207245 is a wasteful number, since it uses less digits than its factorization.

28207245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170972.

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 28207245 is about 5311.0493313469. The cubic root of 28207245 is about 304.4062443067.

The spelling of 28207245 in words is "twenty-eight million, two hundred seven thousand, two hundred forty-five".