28928265 has 32 divisors (see below), whose sum is σ = 48591360. Its totient is φ = 14678784.

The previous prime is 28928257. The next prime is 28928267. The reversal of 28928265 is 56282982.

It is not a de Polignac number, because 28928265 - 2³ = 28928257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28928267) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25531 + ... + 26639.

It is an arithmetic number, because the mean of its divisors is an integer number (1518480).

Almost surely, 2^28928265 is an apocalyptic number.

It is an amenable number.

28928265 is a deficient number, since it is larger than the sum of its proper divisors (19663095).

28928265 is a wasteful number, since it uses less digits than its factorization.

28928265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201.

The product of its digits is 138240, while the sum is 42.

The square root of 28928265 is about 5378.5002556475. The cubic root of 28928265 is about 306.9781485223.

The spelling of 28928265 in words is "twenty-eight million, nine hundred twenty-eight thousand, two hundred sixty-five".