28927569 has 8 divisors (see below), whose sum is σ = 42076512. Its totient is φ = 17531840.

The previous prime is 28927567. The next prime is 28927579. The reversal of 28927569 is 96572982.

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 28927569 - 2¹ = 28927567 is a prime.

It is a super-2 number, since 2×28927569² = 1673608496499522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28927567) 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 7 ways as a sum of consecutive naturals, for example, 438264 + ... + 438329.

It is an arithmetic number, because the mean of its divisors is an integer number (5259564).

Almost surely, 2^28927569 is an apocalyptic number.

It is an amenable number.

28927569 is a deficient number, since it is larger than the sum of its proper divisors (13148943).

28927569 is a wasteful number, since it uses less digits than its factorization.

28927569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876607.

The product of its digits is 544320, while the sum is 48.

The square root of 28927569 is about 5378.4355532069. The cubic root of 28927569 is about 306.9756865876.

The spelling of 28927569 in words is "twenty-eight million, nine hundred twenty-seven thousand, five hundred sixty-nine".