28505836 has 24 divisors (see below), whose sum is σ = 51767856. Its totient is φ = 13723200.

The previous prime is 28505803. The next prime is 28505857. The reversal of 28505836 is 63850582.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a junction number, because it is equal to n+sod(n) for n = 28505795 and 28505804.

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, 13995 + ... + 15901.

It is an arithmetic number, because the mean of its divisors is an integer number (2156994).

Almost surely, 2^28505836 is an apocalyptic number.

It is an amenable number.

28505836 is a deficient number, since it is larger than the sum of its proper divisors (23262020).

28505836 is a wasteful number, since it uses less digits than its factorization.

28505836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2049 (or 2047 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 28505836 is about 5339.0856895165. The cubic root of 28505836 is about 305.4765853784.

The spelling of 28505836 in words is "twenty-eight million, five hundred five thousand, eight hundred thirty-six".