285738 has 8 divisors (see below), whose sum is σ = 571488. Its totient is φ = 95244.

The previous prime is 285731. The next prime is 285749. The reversal of 285738 is 837582.

It is a sphenic number, since it is the product of 3 distinct primes.

285738 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 285699 and 285708.

It is not an unprimeable number, because it can be changed into a prime (285731) by changing a digit.

285738 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23806 + ... + 23817.

It is an arithmetic number, because the mean of its divisors is an integer number (71436).

2²⁸⁵⁷³⁸ is an apocalyptic number.

285738 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

285738 is a wasteful number, since it uses less digits than its factorization.

285738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47628.

The product of its digits is 13440, while the sum is 33.

The square root of 285738 is about 534.5446660477. The cubic root of 285738 is about 65.8651977705.

The spelling of 285738 in words is "two hundred eighty-five thousand, seven hundred thirty-eight".