28105044 has 24 divisors (see below), whose sum is σ = 71540448. Its totient is φ = 8516640.

The previous prime is 28105019. The next prime is 28105069. The reversal of 28105044 is 44050182.

It is an interprime number because it is at equal distance from previous prime (28105019) and next prime (28105069).

It is a congruent number.

It is an unprimeable number.

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, 106327 + ... + 106590.

It is an arithmetic number, because the mean of its divisors is an integer number (2980852).

Almost surely, 2^28105044 is an apocalyptic number.

It is an amenable number.

28105044 is an abundant number, since it is smaller than the sum of its proper divisors (43435404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28105044 is a wasteful number, since it uses less digits than its factorization.

28105044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212935 (or 212933 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 28105044 is about 5301.4190553096. The cubic root of 28105044 is about 304.0381559910.

The spelling of 28105044 in words is "twenty-eight million, one hundred five thousand, forty-four".