28806906 has 8 divisors (see below), whose sum is σ = 57613824. Its totient is φ = 9602300.

The previous prime is 28806871. The next prime is 28806919. The reversal of 28806906 is 60960882.

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

28806906 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2400570 + ... + 2400581.

It is an arithmetic number, because the mean of its divisors is an integer number (7201728).

Almost surely, 2^28806906 is an apocalyptic number.

28806906 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.

28806906 is a wasteful number, since it uses less digits than its factorization.

28806906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4801156.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 28806906 is about 5367.2065359924. The cubic root of 28806906 is about 306.5482716148.

The spelling of 28806906 in words is "twenty-eight million, eight hundred six thousand, nine hundred six".