28767565 has 8 divisors (see below), whose sum is σ = 35711640. Its totient is φ = 22220352.

The previous prime is 28767547. The next prime is 28767569. The reversal of 28767565 is 56576782.

It can be written as a sum of positive squares in 4 ways, for example, as 857476 + 27910089 = 926^2 + 5283^2 .

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 28767565 - 2⁷ = 28767437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28767569) 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, 99054 + ... + 99343.

It is an arithmetic number, because the mean of its divisors is an integer number (4463955).

Almost surely, 2^28767565 is an apocalyptic number.

It is an amenable number.

28767565 is a deficient number, since it is larger than the sum of its proper divisors (6944075).

28767565 is a wasteful number, since it uses less digits than its factorization.

28767565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198431.

The product of its digits is 705600, while the sum is 46.

The square root of 28767565 is about 5363.5403419756. The cubic root of 28767565 is about 306.4086591469.

The spelling of 28767565 in words is "twenty-eight million, seven hundred sixty-seven thousand, five hundred sixty-five".