28969808 has 20 divisors (see below), whose sum is σ = 64147680. Its totient is φ = 12415584.

The previous prime is 28969807. The next prime is 28969817. The reversal of 28969808 is 80896982.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28969807) by changing a digit.

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, 129218 + ... + 129441.

It is an arithmetic number, because the mean of its divisors is an integer number (3207384).

Almost surely, 2^28969808 is an apocalyptic number.

28969808 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28969808 is an abundant number, since it is smaller than the sum of its proper divisors (35177872).

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

28969808 is a wasteful number, since it uses less digits than its factorization.

28969808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258674 (or 258668 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 50.

The square root of 28969808 is about 5382.3608203092. The cubic root of 28969808 is about 307.1250255583.

The spelling of 28969808 in words is "twenty-eight million, nine hundred sixty-nine thousand, eight hundred eight".