28616885 has 8 divisors (see below), whose sum is σ = 37462176. Its totient is φ = 20812240.

The previous prime is 28616879. The next prime is 28616927. The reversal of 28616885 is 58861682.

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

It is not a de Polignac number, because 28616885 - 2⁶ = 28616821 is a prime.

It is a super-2 number, since 2×28616885² = 1637852214206450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 260099 + ... + 260208.

It is an arithmetic number, because the mean of its divisors is an integer number (4682772).

Almost surely, 2^28616885 is an apocalyptic number.

It is an amenable number.

28616885 is a deficient number, since it is larger than the sum of its proper divisors (8845291).

28616885 is a wasteful number, since it uses less digits than its factorization.

28616885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520323.

The product of its digits is 184320, while the sum is 44.

The square root of 28616885 is about 5349.4752079059. The cubic root of 28616885 is about 305.8727488609.

It can be divided in two parts, 286 and 16885, that added together give a palindrome (17171).

The spelling of 28616885 in words is "twenty-eight million, six hundred sixteen thousand, eight hundred eighty-five".