28225769 has 8 divisors (see below), whose sum is σ = 33160512. Its totient is φ = 23685840.

The previous prime is 28225741. The next prime is 28225793. The reversal of 28225769 is 96752282.

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 28225769 - 2²⁰ = 27177193 is a prime.

It is a super-2 number, since 2×28225769² = 1593388071282722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28225969) 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, 98549 + ... + 98834.

It is an arithmetic number, because the mean of its divisors is an integer number (4145064).

Almost surely, 2^28225769 is an apocalyptic number.

It is an amenable number.

28225769 is a deficient number, since it is larger than the sum of its proper divisors (4934743).

28225769 is a wasteful number, since it uses less digits than its factorization.

28225769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197407.

The product of its digits is 120960, while the sum is 41.

The square root of 28225769 is about 5312.7929566284. The cubic root of 28225769 is about 304.4728653393.

The spelling of 28225769 in words is "twenty-eight million, two hundred twenty-five thousand, seven hundred sixty-nine".