28089843 has 8 divisors (see below), whose sum is σ = 37599888. Its totient is φ = 18653184.

The previous prime is 28089833. The next prime is 28089857. The reversal of 28089843 is 34898082.

It is a happy number.

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

It is not a de Polignac number, because 28089843 - 2⁵ = 28089811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28089795 and 28089804.

It is not an unprimeable number, because it can be changed into a prime (28089833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17446 + ... + 18987.

It is an arithmetic number, because the mean of its divisors is an integer number (4699986).

Almost surely, 2^28089843 is an apocalyptic number.

28089843 is a deficient number, since it is larger than the sum of its proper divisors (9510045).

28089843 is a wasteful number, since it uses less digits than its factorization.

28089843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36693.

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 28089843 is about 5299.9851886585. The cubic root of 28089843 is about 303.9833316981.

The spelling of 28089843 in words is "twenty-eight million, eighty-nine thousand, eight hundred forty-three".