28756685 has 8 divisors (see below), whose sum is σ = 35621376. Its totient is φ = 22263120.

The previous prime is 28756667. The next prime is 28756699. The reversal of 28756685 is 58665782.

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

It is not a de Polignac number, because 28756685 - 2¹⁸ = 28494541 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, 92609 + ... + 92918.

It is an arithmetic number, because the mean of its divisors is an integer number (4452672).

Almost surely, 2^28756685 is an apocalyptic number.

It is an amenable number.

28756685 is a deficient number, since it is larger than the sum of its proper divisors (6864691).

28756685 is a wasteful number, since it uses less digits than its factorization.

28756685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185563.

The product of its digits is 806400, while the sum is 47.

The square root of 28756685 is about 5362.5259906130. The cubic root of 28756685 is about 306.3700259782.

The spelling of 28756685 in words is "twenty-eight million, seven hundred fifty-six thousand, six hundred eighty-five".