287444 has 6 divisors (see below), whose sum is σ = 503034. Its totient is φ = 143720.

The previous prime is 287437. The next prime is 287449. The reversal of 287444 is 444782.

It can be written as a sum of positive squares in only one way, i.e., 150544 + 136900 = 388^2 + 370^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287449) by changing a digit.

287444 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 as a sum of consecutive naturals, namely, 35927 + ... + 35934.

It is an arithmetic number, because the mean of its divisors is an integer number (83839).

2²⁸⁷⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

287444 is a deficient number, since it is larger than the sum of its proper divisors (215590).

287444 is a wasteful number, since it uses less digits than its factorization.

287444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71865 (or 71863 counting only the distinct ones).

The product of its digits is 7168, while the sum is 29.

The square root of 287444 is about 536.1380419258. The cubic root of 287444 is about 65.9960205743.

The spelling of 287444 in words is "two hundred eighty-seven thousand, four hundred forty-four".