285728971 has 8 divisors (see below), whose sum is σ = 312257088. Its totient is φ = 259293000.

The previous prime is 285728957. The next prime is 285728987. The reversal of 285728971 is 179827582.

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 285728971 - 2¹³ = 285720779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (285728771) 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, 16465 + ... + 29026.

It is an arithmetic number, because the mean of its divisors is an integer number (39032136).

Almost surely, 2^285728971 is an apocalyptic number.

285728971 is a deficient number, since it is larger than the sum of its proper divisors (26528117).

285728971 is a wasteful number, since it uses less digits than its factorization.

285728971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46073.

The product of its digits is 564480, while the sum is 49.

The square root of 285728971 is about 16903.5194855983. The cubic root of 285728971 is about 658.6450400774.

The spelling of 285728971 in words is "two hundred eighty-five million, seven hundred twenty-eight thousand, nine hundred seventy-one".