285215693 has 8 divisors (see below), whose sum is σ = 332896512. Its totient is φ = 239268816.

The previous prime is 285215677. The next prime is 285215699. The reversal of 285215693 is 396512582.

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 285215693 - 2⁴ = 285215677 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 285215693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285215699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433130 + ... + 433787.

It is an arithmetic number, because the mean of its divisors is an integer number (41612064).

Almost surely, 2^285215693 is an apocalyptic number.

It is an amenable number.

285215693 is a deficient number, since it is larger than the sum of its proper divisors (47680819).

285215693 is an equidigital number, since it uses as much as digits as its factorization.

285215693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866971.

The product of its digits is 129600, while the sum is 41.

The square root of 285215693 is about 16888.3300832261. The cubic root of 285215693 is about 658.2504112759.

The spelling of 285215693 in words is "two hundred eighty-five million, two hundred fifteen thousand, six hundred ninety-three".