28444906 has 8 divisors (see below), whose sum is σ = 48762720. Its totient is φ = 12190668.

The previous prime is 28444883. The next prime is 28444909. The reversal of 28444906 is 60944482.

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

It is a super-2 number, since 2×28444906² = 1618225354697672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28444909) 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, 1015876 + ... + 1015903.

It is an arithmetic number, because the mean of its divisors is an integer number (6095340).

Almost surely, 2^28444906 is an apocalyptic number.

28444906 is a deficient number, since it is larger than the sum of its proper divisors (20317814).

28444906 is a wasteful number, since it uses less digits than its factorization.

28444906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2031788.

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 28444906 is about 5333.3766039911. The cubic root of 28444906 is about 305.2587824299.

It can be divided in two parts, 2844 and 4906, that added together give a triangular number (7750 = T₁₂₄).

The spelling of 28444906 in words is "twenty-eight million, four hundred forty-four thousand, nine hundred six".