28969906 has 16 divisors (see below), whose sum is σ = 50601024. Its totient is φ = 12181104.

The previous prime is 28969901. The next prime is 28969909. The reversal of 28969906 is 60996982.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28969906.

It is not an unprimeable number, because it can be changed into a prime (28969901) 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, 18780 + ... + 20263.

It is an arithmetic number, because the mean of its divisors is an integer number (3162564).

Almost surely, 2^28969906 is an apocalyptic number.

28969906 is a deficient number, since it is larger than the sum of its proper divisors (21631118).

28969906 is a wasteful number, since it uses less digits than its factorization.

28969906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39105.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 28969906 is about 5382.3699241134. The cubic root of 28969906 is about 307.1253718754.

The spelling of 28969906 in words is "twenty-eight million, nine hundred sixty-nine thousand, nine hundred six".