28688982 has 16 divisors (see below), whose sum is σ = 65574912. Its totient is φ = 8196840.

The previous prime is 28688923. The next prime is 28688987. The reversal of 28688982 is 28988682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28688987) 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, 341494 + ... + 341577.

It is an arithmetic number, because the mean of its divisors is an integer number (4098432).

Almost surely, 2^28688982 is an apocalyptic number.

28688982 is an abundant number, since it is smaller than the sum of its proper divisors (36885930).

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

28688982 is a wasteful number, since it uses less digits than its factorization.

28688982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683083.

The product of its digits is 884736, while the sum is 51.

The square root of 28688982 is about 5356.2096672927. The cubic root of 28688982 is about 306.1294040239.

The spelling of 28688982 in words is "twenty-eight million, six hundred eighty-eight thousand, nine hundred eighty-two".