28769591 has 8 divisors (see below), whose sum is σ = 30468480. Its totient is φ = 27089208.

The previous prime is 28769579. The next prime is 28769597. The reversal of 28769591 is 19596782.

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 28769591 - 2¹⁰ = 28768567 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 (28769597) 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, 1361 + ... + 7706.

It is an arithmetic number, because the mean of its divisors is an integer number (3808560).

Almost surely, 2^28769591 is an apocalyptic number.

28769591 is a deficient number, since it is larger than the sum of its proper divisors (1698889).

28769591 is a wasteful number, since it uses less digits than its factorization.

28769591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9253.

The product of its digits is 272160, while the sum is 47.

The square root of 28769591 is about 5363.7292064384. The cubic root of 28769591 is about 306.4158520784.

The spelling of 28769591 in words is "twenty-eight million, seven hundred sixty-nine thousand, five hundred ninety-one".