28865769 has 8 divisors (see below), whose sum is σ = 40513440. Its totient is φ = 18230976.

The previous prime is 28865747. The next prime is 28865773. The reversal of 28865769 is 96756882.

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

It is not a de Polignac number, because 28865769 - 2¹¹ = 28863721 is a prime.

It is a super-2 number, since 2×28865769² = 1666465239922722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28861769) 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, 253152 + ... + 253265.

It is an arithmetic number, because the mean of its divisors is an integer number (5064180).

Almost surely, 2^28865769 is an apocalyptic number.

It is an amenable number.

28865769 is a deficient number, since it is larger than the sum of its proper divisors (11647671).

28865769 is a wasteful number, since it uses less digits than its factorization.

28865769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506439.

The product of its digits is 1451520, while the sum is 51.

The square root of 28865769 is about 5372.6873164181. The cubic root of 28865769 is about 306.7569261466.

The spelling of 28865769 in words is "twenty-eight million, eight hundred sixty-five thousand, seven hundred sixty-nine".