28442906 has 8 divisors (see below), whose sum is σ = 42744000. Its totient is φ = 14194908.

The previous prime is 28442893. The next prime is 28442929. The reversal of 28442906 is 60924482.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11906 + ... + 14093.

It is an arithmetic number, because the mean of its divisors is an integer number (5343000).

Almost surely, 2^28442906 is an apocalyptic number.

28442906 is a deficient number, since it is larger than the sum of its proper divisors (14301094).

28442906 is a wasteful number, since it uses less digits than its factorization.

28442906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26548.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 28442906 is about 5333.1891022164. The cubic root of 28442906 is about 305.2516278756.

The spelling of 28442906 in words is "twenty-eight million, four hundred forty-two thousand, nine hundred six".