28710785 has 8 divisors (see below), whose sum is σ = 35951040. Its totient is φ = 21969904.

The previous prime is 28710769. The next prime is 28710793. The reversal of 28710785 is 58701782.

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 28710785 - 2⁴ = 28710769 is a prime.

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, 124715 + ... + 124944.

It is an arithmetic number, because the mean of its divisors is an integer number (4493880).

Almost surely, 2^28710785 is an apocalyptic number.

It is an amenable number.

28710785 is a deficient number, since it is larger than the sum of its proper divisors (7240255).

28710785 is a wasteful number, since it uses less digits than its factorization.

28710785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249687.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 28710785 is about 5358.2445819503. The cubic root of 28710785 is about 306.2069349413.

The spelling of 28710785 in words is "twenty-eight million, seven hundred ten thousand, seven hundred eighty-five".