28865196 has 18 divisors (see below), whose sum is σ = 72964892. Its totient is φ = 9621720.

The previous prime is 28865153. The next prime is 28865197. The reversal of 28865196 is 69156882.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (28865197) 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 5 ways as a sum of consecutive naturals, for example, 400870 + ... + 400941.

Almost surely, 2^28865196 is an apocalyptic number.

It is an amenable number.

28865196 is an abundant number, since it is smaller than the sum of its proper divisors (44099696).

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

28865196 is a wasteful number, since it uses less digits than its factorization.

28865196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801821 (or 801816 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 28865196 is about 5372.6339908838. The cubic root of 28865196 is about 306.7548963735.

The spelling of 28865196 in words is "twenty-eight million, eight hundred sixty-five thousand, one hundred ninety-six".