28641836 has 24 divisors (see below), whose sum is σ = 51438240. Its totient is φ = 13949312.

The previous prime is 28641793. The next prime is 28641853. The reversal of 28641836 is 63814682.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28641836.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35000 + ... + 35808.

It is an arithmetic number, because the mean of its divisors is an integer number (2143260).

Almost surely, 2^28641836 is an apocalyptic number.

It is an amenable number.

28641836 is a deficient number, since it is larger than the sum of its proper divisors (22796404).

28641836 is a wasteful number, since it uses less digits than its factorization.

28641836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033 (or 1031 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The square root of 28641836 is about 5351.8067977086. The cubic root of 28641836 is about 305.9616196327.

The spelling of 28641836 in words is "twenty-eight million, six hundred forty-one thousand, eight hundred thirty-six".