28523845 has 32 divisors (see below), whose sum is σ = 41932800. Its totient is φ = 18190656.

The previous prime is 28523839. The next prime is 28523857. The reversal of 28523845 is 54832582.

It is a cyclic number.

It is not a de Polignac number, because 28523845 - 2³ = 28523837 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38872 + ... + 39598.

It is an arithmetic number, because the mean of its divisors is an integer number (1310400).

Almost surely, 2^28523845 is an apocalyptic number.

It is an amenable number.

28523845 is a deficient number, since it is larger than the sum of its proper divisors (13408955).

28523845 is a wasteful number, since it uses less digits than its factorization.

28523845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817.

The product of its digits is 76800, while the sum is 37.

The square root of 28523845 is about 5340.7719479491. The cubic root of 28523845 is about 305.5409016786.

The spelling of 28523845 in words is "twenty-eight million, five hundred twenty-three thousand, eight hundred forty-five".