28365577 has 8 divisors (see below), whose sum is σ = 28800000. Its totient is φ = 27934704.

The previous prime is 28365559. The next prime is 28365583. The reversal of 28365577 is 77556382.

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 28365577 - 2¹¹ = 28363529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28365517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18174 + ... + 19672.

It is an arithmetic number, because the mean of its divisors is an integer number (3600000).

Almost surely, 2^28365577 is an apocalyptic number.

It is an amenable number.

28365577 is a deficient number, since it is larger than the sum of its proper divisors (434423).

28365577 is a wasteful number, since it uses less digits than its factorization.

28365577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1775.

The product of its digits is 352800, while the sum is 43.

The square root of 28365577 is about 5325.9343781162. The cubic root of 28365577 is about 304.9747430487.

The spelling of 28365577 in words is "twenty-eight million, three hundred sixty-five thousand, five hundred seventy-seven".