28786164 has 24 divisors (see below), whose sum is σ = 73274208. Its totient is φ = 8723040.

The previous prime is 28786129. The next prime is 28786171. The reversal of 28786164 is 46168782.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108907 + ... + 109170.

It is an arithmetic number, because the mean of its divisors is an integer number (3053092).

Almost surely, 2^28786164 is an apocalyptic number.

It is an amenable number.

28786164 is an abundant number, since it is smaller than the sum of its proper divisors (44488044).

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

28786164 is a wasteful number, since it uses less digits than its factorization.

28786164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218095 (or 218093 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The square root of 28786164 is about 5365.2738979478. The cubic root of 28786164 is about 306.4746787183.

The spelling of 28786164 in words is "twenty-eight million, seven hundred eighty-six thousand, one hundred sixty-four".