28334427 has 24 divisors (see below), whose sum is σ = 43795392. Its totient is φ = 16156800.

The previous prime is 28334417. The next prime is 28334429. The reversal of 28334427 is 72443382.

It is not a de Polignac number, because 28334427 - 2¹¹ = 28332379 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (28334429) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 8052 + ... + 11022.

It is an arithmetic number, because the mean of its divisors is an integer number (1824808).

Almost surely, 2^28334427 is an apocalyptic number.

28334427 is a deficient number, since it is larger than the sum of its proper divisors (15460965).

28334427 is a wasteful number, since it uses less digits than its factorization.

28334427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3019 (or 3002 counting only the distinct ones).

The product of its digits is 32256, while the sum is 33.

The square root of 28334427 is about 5323.0092053274. The cubic root of 28334427 is about 304.8630649295.

It can be divided in two parts, 2833 and 4427, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 28334427 in words is "twenty-eight million, three hundred thirty-four thousand, four hundred twenty-seven".