28585836 has 36 divisors (see below), whose sum is σ = 72908472. Its totient is φ = 9442944.

The previous prime is 28585831. The next prime is 28585871. The reversal of 28585836 is 63858582.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 28585791 and 28585800.

It is not an unprimeable number, because it can be changed into a prime (28585831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 555 + ... + 7581.

Almost surely, 2^28585836 is an apocalyptic number.

It is an amenable number.

28585836 is an abundant number, since it is smaller than the sum of its proper divisors (44322636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28585836 is a wasteful number, since it uses less digits than its factorization.

28585836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7150 (or 7145 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The square root of 28585836 is about 5346.5723599330. The cubic root of 28585836 is about 305.7620859920.

The spelling of 28585836 in words is "twenty-eight million, five hundred eighty-five thousand, eight hundred thirty-six".