28543836 has 12 divisors (see below), whose sum is σ = 66602312. Its totient is φ = 9514608.

The previous prime is 28543817. The next prime is 28543843. The reversal of 28543836 is 63834582.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28543794 and 28543803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1189315 + ... + 1189338.

Almost surely, 2^28543836 is an apocalyptic number.

It is an amenable number.

28543836 is an abundant number, since it is smaller than the sum of its proper divisors (38058476).

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

28543836 is a wasteful number, since it uses less digits than its factorization.

28543836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2378660 (or 2378658 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 28543836 is about 5342.6431660743. The cubic root of 28543836 is about 305.6122646823.

The spelling of 28543836 in words is "twenty-eight million, five hundred forty-three thousand, eight hundred thirty-six".