287938 has 16 divisors (see below), whose sum is σ = 500544. Its totient is φ = 121680.

The previous prime is 287933. The next prime is 287939. The reversal of 287938 is 839782.

It is a junction number, because it is equal to n+sod(n) for n = 287897 and 287906.

It is not an unprimeable number, because it can be changed into a prime (287933) by changing a digit.

287938 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1756 + ... + 1912.

It is an arithmetic number, because the mean of its divisors is an integer number (31284).

2²⁸⁷⁹³⁸ is an apocalyptic number.

287938 is a deficient number, since it is larger than the sum of its proper divisors (212606).

287938 is a wasteful number, since it uses less digits than its factorization.

287938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297.

The product of its digits is 24192, while the sum is 37.

The square root of 287938 is about 536.5985464013. The cubic root of 287938 is about 66.0338057607.

It can be divided in two parts, 287 and 938, that added together give a triangular number (1225 = T₄₉).

The spelling of 287938 in words is "two hundred eighty-seven thousand, nine hundred thirty-eight".