28650809 has 8 divisors (see below), whose sum is σ = 31297152. Its totient is φ = 26011440.

The previous prime is 28650799. The next prime is 28650829. The reversal of 28650809 is 90805682.

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

It is a cyclic number.

It is not a de Polignac number, because 28650809 - 2¹² = 28646713 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28650829) 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, 10832 + ... + 13214.

It is an arithmetic number, because the mean of its divisors is an integer number (3912144).

Almost surely, 2^28650809 is an apocalyptic number.

It is an amenable number.

28650809 is a deficient number, since it is larger than the sum of its proper divisors (2646343).

28650809 is a wasteful number, since it uses less digits than its factorization.

28650809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3487.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 28650809 is about 5352.6450470772. The cubic root of 28650809 is about 305.9935671537.

The spelling of 28650809 in words is "twenty-eight million, six hundred fifty thousand, eight hundred nine".