28000569 has 8 divisors (see below), whose sum is σ = 37550592. Its totient is φ = 18558800.

The previous prime is 28000561. The next prime is 28000571. The reversal of 28000569 is 96500082.

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 28000569 - 2³ = 28000561 is a prime.

It is a super-2 number, since 2×28000569² = 1568063728647522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28000561) 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, 26457 + ... + 27494.

It is an arithmetic number, because the mean of its divisors is an integer number (4693824).

Almost surely, 2^28000569 is an apocalyptic number.

It is an amenable number.

28000569 is a deficient number, since it is larger than the sum of its proper divisors (9550023).

28000569 is a wasteful number, since it uses less digits than its factorization.

28000569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54127.

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

The square root of 28000569 is about 5291.5563873023. The cubic root of 28000569 is about 303.6609541012.

The spelling of 28000569 in words is "twenty-eight million, five hundred sixty-nine", and thus it is an aban number.