28785170 has 16 divisors (see below), whose sum is σ = 51874560. Its totient is φ = 11500464.

The previous prime is 28785091. The next prime is 28785179. The reversal of 28785170 is 7158782.

It is not an unprimeable number, because it can be changed into a prime (28785179) 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, 14879 + ... + 16701.

It is an arithmetic number, because the mean of its divisors is an integer number (3242160).

Almost surely, 2^28785170 is an apocalyptic number.

28785170 is a deficient number, since it is larger than the sum of its proper divisors (23089390).

28785170 is a wasteful number, since it uses less digits than its factorization.

28785170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3409.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 28785170 is about 5365.1812644122. The cubic root of 28785170 is about 306.4711511053.

The spelling of 28785170 in words is "twenty-eight million, seven hundred eighty-five thousand, one hundred seventy".