28618985 has 8 divisors (see below), whose sum is σ = 34506816. Its totient is φ = 22785840.

The previous prime is 28618963. The next prime is 28618987. The reversal of 28618985 is 58981682.

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

It is not a de Polignac number, because 28618985 - 2⁸ = 28618729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28618987) by changing a digit.

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, 12509 + ... + 14618.

It is an arithmetic number, because the mean of its divisors is an integer number (4313352).

Almost surely, 2^28618985 is an apocalyptic number.

It is an amenable number.

28618985 is a deficient number, since it is larger than the sum of its proper divisors (5887831).

28618985 is a wasteful number, since it uses less digits than its factorization.

28618985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27343.

The product of its digits is 276480, while the sum is 47.

The square root of 28618985 is about 5349.6714852409. The cubic root of 28618985 is about 305.8802306566.

The spelling of 28618985 in words is "twenty-eight million, six hundred eighteen thousand, nine hundred eighty-five".