28828685 has 8 divisors (see below), whose sum is σ = 36629496. Its totient is φ = 21706240.

The previous prime is 28828621. The next prime is 28828721. The reversal of 28828685 is 58682882.

It can be written as a sum of positive squares in 4 ways, for example, as 14645929 + 14182756 = 3827^2 + 3766^2 .

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

It is not a de Polignac number, because 28828685 - 2⁶ = 28828621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169496 + ... + 169665.

It is an arithmetic number, because the mean of its divisors is an integer number (4578687).

Almost surely, 2^28828685 is an apocalyptic number.

It is an amenable number.

28828685 is a deficient number, since it is larger than the sum of its proper divisors (7800811).

28828685 is a wasteful number, since it uses less digits than its factorization.

28828685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339183.

The product of its digits is 491520, while the sum is 47.

The square root of 28828685 is about 5369.2350479375. The cubic root of 28828685 is about 306.6255057915.

The spelling of 28828685 in words is "twenty-eight million, eight hundred twenty-eight thousand, six hundred eighty-five".