28680018 has 16 divisors (see below), whose sum is σ = 58332960. Its totient is φ = 9397856.

The previous prime is 28680017. The next prime is 28680019. The reversal of 28680018 is 81008682.

It is an interprime number because it is at equal distance from previous prime (28680017) and next prime (28680019).

It is not an unprimeable number, because it can be changed into a prime (28680017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40155 + ... + 40862.

It is an arithmetic number, because the mean of its divisors is an integer number (3645810).

Almost surely, 2^28680018 is an apocalyptic number.

28680018 is an abundant number, since it is smaller than the sum of its proper divisors (29652942).

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

28680018 is a wasteful number, since it uses less digits than its factorization.

28680018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81081.

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 28680018 is about 5355.3728161539. The cubic root of 28680018 is about 306.0975168714.

The spelling of 28680018 in words is "twenty-eight million, six hundred eighty thousand, eighteen".