28569101 has 4 divisors (see below), whose sum is σ = 31166304. Its totient is φ = 25971900.

The previous prime is 28569083. The next prime is 28569109. The reversal of 28569101 is 10196582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28569101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28569109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1298585 + ... + 1298606.

It is an arithmetic number, because the mean of its divisors is an integer number (7791576).

Almost surely, 2^28569101 is an apocalyptic number.

It is an amenable number.

28569101 is a deficient number, since it is larger than the sum of its proper divisors (2597203).

28569101 is a wasteful number, since it uses less digits than its factorization.

28569101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2597202.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 28569101 is about 5345.0071094434. The cubic root of 28569101 is about 305.7024069331.

The spelling of 28569101 in words is "twenty-eight million, five hundred sixty-nine thousand, one hundred one".