28085427 has 16 divisors (see below), whose sum is σ = 43044000. Its totient is φ = 18077472.

The previous prime is 28085423. The next prime is 28085429. The reversal of 28085427 is 72458082.

It is a happy number.

It is not a de Polignac number, because 28085427 - 2² = 28085423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28085391 and 28085400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28085423) 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 15 ways as a sum of consecutive naturals, for example, 17152 + ... + 18717.

It is an arithmetic number, because the mean of its divisors is an integer number (2690250).

Almost surely, 2^28085427 is an apocalyptic number.

28085427 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28085427 is a deficient number, since it is larger than the sum of its proper divisors (14958573).

28085427 is a wasteful number, since it uses less digits than its factorization.

28085427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35907 (or 35901 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 28085427 is about 5299.5685673458. The cubic root of 28085427 is about 303.9674011386.

The spelling of 28085427 in words is "twenty-eight million, eighty-five thousand, four hundred twenty-seven".