28807982 has 36 divisors (see below), whose sum is σ = 51751440. Its totient is φ = 11990160.

The previous prime is 28807981. The next prime is 28807993. The reversal of 28807982 is 28970882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28807981) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 364619 + ... + 364697.

It is an arithmetic number, because the mean of its divisors is an integer number (1437540).

Almost surely, 2^28807982 is an apocalyptic number.

28807982 is a deficient number, since it is larger than the sum of its proper divisors (22943458).

28807982 is an equidigital number, since it uses as much as digits as its factorization.

28807982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 28807982 is about 5367.3067734200. The cubic root of 28807982 is about 306.5520883134.

The spelling of 28807982 in words is "twenty-eight million, eight hundred seven thousand, nine hundred eighty-two".