28936985 has 16 divisors (see below), whose sum is σ = 43293312. Its totient is φ = 18038400.

The previous prime is 28936951. The next prime is 28936987. The reversal of 28936985 is 58963982.

It is a de Polignac number, because none of the positive numbers 2^k-28936985 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28936987) 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 15 ways as a sum of consecutive naturals, for example, 37196 + ... + 37965.

It is an arithmetic number, because the mean of its divisors is an integer number (2705832).

Almost surely, 2^28936985 is an apocalyptic number.

It is an amenable number.

28936985 is a deficient number, since it is larger than the sum of its proper divisors (14356327).

28936985 is a wasteful number, since it uses less digits than its factorization.

28936985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75184.

The product of its digits is 933120, while the sum is 50.

The square root of 28936985 is about 5379.3108294651. The cubic root of 28936985 is about 307.0089901062.

The spelling of 28936985 in words is "twenty-eight million, nine hundred thirty-six thousand, nine hundred eighty-five".