28680818 has 8 divisors (see below), whose sum is σ = 43046640. Its totient is φ = 14331940.

The previous prime is 28680811. The next prime is 28680829. The reversal of 28680818 is 81808682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×28680818² = 1645178642298248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28680811) 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 3 ways as a sum of consecutive naturals, for example, 1613 + ... + 7743.

It is an arithmetic number, because the mean of its divisors is an integer number (5380830).

Almost surely, 2^28680818 is an apocalyptic number.

28680818 is a deficient number, since it is larger than the sum of its proper divisors (14365822).

28680818 is a wasteful number, since it uses less digits than its factorization.

28680818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8472.

The product of its (nonzero) digits is 49152, while the sum is 41.

The square root of 28680818 is about 5355.4475069783. The cubic root of 28680818 is about 306.1003629382.

The spelling of 28680818 in words is "twenty-eight million, six hundred eighty thousand, eight hundred eighteen".