285889121 has 16 divisors (see below), whose sum is σ = 336206976. Its totient is φ = 237966336.

The previous prime is 285889061. The next prime is 285889129. The reversal of 285889121 is 121988582.

It is a cyclic number.

It is not a de Polignac number, because 285889121 - 2¹⁴ = 285872737 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (285889129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234305 + ... + 235521.

It is an arithmetic number, because the mean of its divisors is an integer number (21012936).

Almost surely, 2^285889121 is an apocalyptic number.

It is an amenable number.

285889121 is a deficient number, since it is larger than the sum of its proper divisors (50317855).

285889121 is a wasteful number, since it uses less digits than its factorization.

285889121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2168.

The product of its digits is 92160, while the sum is 44.

The square root of 285889121 is about 16908.2560011374. The cubic root of 285889121 is about 658.7680731059.

The spelling of 285889121 in words is "two hundred eighty-five million, eight hundred eighty-nine thousand, one hundred twenty-one".