28928906 has 16 divisors (see below), whose sum is σ = 45943200. Its totient is φ = 13623408.

The previous prime is 28928897. The next prime is 28928941. The reversal of 28928906 is 60982982.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4676 + ... + 8928.

It is an arithmetic number, because the mean of its divisors is an integer number (2871450).

Almost surely, 2^28928906 is an apocalyptic number.

28928906 is a deficient number, since it is larger than the sum of its proper divisors (17014294).

28928906 is a wasteful number, since it uses less digits than its factorization.

28928906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4453.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 28928906 is about 5378.5598444193. The cubic root of 28928906 is about 306.9804158727.

The spelling of 28928906 in words is "twenty-eight million, nine hundred twenty-eight thousand, nine hundred six".