28090065 has 8 divisors (see below), whose sum is σ = 44944128. Its totient is φ = 14981360.

The previous prime is 28090039. The next prime is 28090081. The reversal of 28090065 is 56009082.

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

It is not a de Polignac number, because 28090065 - 2⁹ = 28089553 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 936321 + ... + 936350.

It is an arithmetic number, because the mean of its divisors is an integer number (5618016).

Almost surely, 2^28090065 is an apocalyptic number.

It is an amenable number.

28090065 is a deficient number, since it is larger than the sum of its proper divisors (16854063).

28090065 is a wasteful number, since it uses less digits than its factorization.

28090065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1872679.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 28090065 is about 5300.0061320719. The cubic root of 28090065 is about 303.9841325109.

The spelling of 28090065 in words is "twenty-eight million, ninety thousand, sixty-five".