28879317 has 6 divisors (see below), whose sum is σ = 41714582. Its totient is φ = 19252872.

The previous prime is 28879303. The next prime is 28879327. The reversal of 28879317 is 71397882.

It can be written as a sum of positive squares in only one way, i.e., 25341156 + 3538161 = 5034^2 + 1881^2 .

It is not a de Polignac number, because 28879317 - 2¹¹ = 28877269 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 (28879327) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1604398 + ... + 1604415.

Almost surely, 2^28879317 is an apocalyptic number.

It is an amenable number.

28879317 is a deficient number, since it is larger than the sum of its proper divisors (12835265).

28879317 is a wasteful number, since it uses less digits than its factorization.

28879317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3208819 (or 3208816 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 28879317 is about 5373.9479900721. The cubic root of 28879317 is about 306.8049102348.

The spelling of 28879317 in words is "twenty-eight million, eight hundred seventy-nine thousand, three hundred seventeen".