28785982 has 16 divisors (see below), whose sum is σ = 44420400. Its totient is φ = 13984960.

The previous prime is 28785979. The next prime is 28785983. The reversal of 28785982 is 28958782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28785983) by changing a digit.

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, 9132 + ... + 11872.

It is an arithmetic number, because the mean of its divisors is an integer number (2776275).

Almost surely, 2^28785982 is an apocalyptic number.

28785982 is a deficient number, since it is larger than the sum of its proper divisors (15634418).

28785982 is a wasteful number, since it uses less digits than its factorization.

28785982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2891.

The product of its digits is 645120, while the sum is 49.

The square root of 28785982 is about 5365.2569369975. The cubic root of 28785982 is about 306.4740328234.

The spelling of 28785982 in words is "twenty-eight million, seven hundred eighty-five thousand, nine hundred eighty-two".