28928207 has 16 divisors (see below), whose sum is σ = 36909312. Its totient is φ = 22014720.

The previous prime is 28928189. The next prime is 28928219. The reversal of 28928207 is 70282982.

It is not a de Polignac number, because 28928207 - 2⁶ = 28928143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28928257) 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, 1058 + ... + 7679.

It is an arithmetic number, because the mean of its divisors is an integer number (2306832).

Almost surely, 2^28928207 is an apocalyptic number.

28928207 is a deficient number, since it is larger than the sum of its proper divisors (7981105).

28928207 is a wasteful number, since it uses less digits than its factorization.

28928207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8798.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 28928207 is about 5378.4948638072. The cubic root of 28928207 is about 306.9779433626.

The spelling of 28928207 in words is "twenty-eight million, nine hundred twenty-eight thousand, two hundred seven".