28746857 has 8 divisors (see below), whose sum is σ = 29077056. Its totient is φ = 28418832.

The previous prime is 28746811. The next prime is 28746869. The reversal of 28746857 is 75864782.

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 28746857 - 2¹⁰ = 28745833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28746257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44108 + ... + 44754.

It is an arithmetic number, because the mean of its divisors is an integer number (3634632).

Almost surely, 2^28746857 is an apocalyptic number.

It is an amenable number.

28746857 is a deficient number, since it is larger than the sum of its proper divisors (330199).

28746857 is a wasteful number, since it uses less digits than its factorization.

28746857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1087.

The product of its digits is 752640, while the sum is 47.

The square root of 28746857 is about 5361.6095531100. The cubic root of 28746857 is about 306.3351199184.

The spelling of 28746857 in words is "twenty-eight million, seven hundred forty-six thousand, eight hundred fifty-seven".