28136885 has 8 divisors (see below), whose sum is σ = 38587776. Its totient is φ = 19293840.

The previous prime is 28136863. The next prime is 28136903. The reversal of 28136885 is 58863182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28136885 - 2⁶ = 28136821 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 401921 + ... + 401990.

It is an arithmetic number, because the mean of its divisors is an integer number (4823472).

Almost surely, 2^28136885 is an apocalyptic number.

It is an amenable number.

28136885 is a deficient number, since it is larger than the sum of its proper divisors (10450891).

28136885 is an equidigital number, since it uses as much as digits as its factorization.

28136885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803923.

The product of its digits is 92160, while the sum is 41.

The square root of 28136885 is about 5304.4212690924. The cubic root of 28136885 is about 304.1529304695.

The spelling of 28136885 in words is "twenty-eight million, one hundred thirty-six thousand, eight hundred eighty-five".