28836668 has 12 divisors (see below), whose sum is σ = 57673392. Its totient is φ = 12358560.

The previous prime is 28836631. The next prime is 28836671. The reversal of 28836668 is 86663882.

It is a happy number.

28836668 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 514913 + ... + 514968.

It is an arithmetic number, because the mean of its divisors is an integer number (4806116).

Almost surely, 2^28836668 is an apocalyptic number.

28836668 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28836668 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28836668 is a wasteful number, since it uses less digits than its factorization.

28836668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029892 (or 1029890 counting only the distinct ones).

The product of its digits is 663552, while the sum is 47.

The square root of 28836668 is about 5369.9783984668. The cubic root of 28836668 is about 306.6538059089.

The spelling of 28836668 in words is "twenty-eight million, eight hundred thirty-six thousand, six hundred sixty-eight".