28804923 has 16 divisors (see below), whose sum is σ = 48770560. Its totient is φ = 16459848.

The previous prime is 28804903. The next prime is 28804927. The reversal of 28804923 is 32940882.

It is not a de Polignac number, because 28804923 - 2¹⁷ = 28673851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28804927) 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, 76015 + ... + 76392.

It is an arithmetic number, because the mean of its divisors is an integer number (3048160).

Almost surely, 2^28804923 is an apocalyptic number.

28804923 is a deficient number, since it is larger than the sum of its proper divisors (19965637).

28804923 is a wasteful number, since it uses less digits than its factorization.

28804923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152423 (or 152417 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 28804923 is about 5367.0217998439. The cubic root of 28804923 is about 306.5412374315.

The spelling of 28804923 in words is "twenty-eight million, eight hundred four thousand, nine hundred twenty-three".