28326636 has 36 divisors (see below), whose sum is σ = 77112672. Its totient is φ = 8715744.

The previous prime is 28326601. The next prime is 28326643. The reversal of 28326636 is 63662382.

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28326636.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29796 + ... + 30731.

Almost surely, 2^28326636 is an apocalyptic number.

28326636 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

28326636 is an abundant number, since it is smaller than the sum of its proper divisors (48786036).

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

28326636 is a wasteful number, since it uses less digits than its factorization.

28326636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60550 (or 60545 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 28326636 is about 5322.2773321202. The cubic root of 28326636 is about 304.8351200568.

The spelling of 28326636 in words is "twenty-eight million, three hundred twenty-six thousand, six hundred thirty-six".