285689141 has 4 divisors (see below), whose sum is σ = 298110432. Its totient is φ = 273267852.

The previous prime is 285689137. The next prime is 285689197. The reversal of 285689141 is 141986582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 285689141 - 2² = 285689137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 285689092 and 285689101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285689101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6210611 + ... + 6210656.

It is an arithmetic number, because the mean of its divisors is an integer number (74527608).

Almost surely, 2^285689141 is an apocalyptic number.

It is an amenable number.

285689141 is a deficient number, since it is larger than the sum of its proper divisors (12421291).

285689141 is a wasteful number, since it uses less digits than its factorization.

285689141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12421290.

The product of its digits is 138240, while the sum is 44.

The square root of 285689141 is about 16902.3412875258. The cubic root of 285689141 is about 658.6144340910.

The spelling of 285689141 in words is "two hundred eighty-five million, six hundred eighty-nine thousand, one hundred forty-one".