28444899 has 16 divisors (see below), whose sum is σ = 43665408. Its totient is φ = 16133952.

The previous prime is 28444883. The next prime is 28444909. The reversal of 28444899 is 99844482.

It is not a de Polignac number, because 28444899 - 2⁴ = 28444883 is a prime.

It is a super-2 number, since 2×28444899² = 1618224558240402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28444499) 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 15 ways as a sum of consecutive naturals, for example, 2067 + ... + 7820.

It is an arithmetic number, because the mean of its divisors is an integer number (2729088).

Almost surely, 2^28444899 is an apocalyptic number.

28444899 is a deficient number, since it is larger than the sum of its proper divisors (15220509).

28444899 is a wasteful number, since it uses less digits than its factorization.

28444899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10034.

The product of its digits is 663552, while the sum is 48.

The square root of 28444899 is about 5333.3759477464. The cubic root of 28444899 is about 305.2587573896.

The spelling of 28444899 in words is "twenty-eight million, four hundred forty-four thousand, eight hundred ninety-nine".