287738 has 24 divisors (see below), whose sum is σ = 502740. Its totient is φ = 123200.

The previous prime is 287731. The next prime is 287747. The reversal of 287738 is 837782.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 267289 + 20449 = 517^2 + 143^2 .

It is a junction number, because it is equal to n+sod(n) for n = 287698 and 287707.

It is not an unprimeable number, because it can be changed into a prime (287731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6998 + ... + 7038.

2²⁸⁷⁷³⁸ is an apocalyptic number.

287738 is a deficient number, since it is larger than the sum of its proper divisors (215002).

287738 is a wasteful number, since it uses less digits than its factorization.

287738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94 (or 83 counting only the distinct ones).

The product of its digits is 18816, while the sum is 35.

The square root of 287738 is about 536.4121549704. The cubic root of 287738 is about 66.0185133250.

The spelling of 287738 in words is "two hundred eighty-seven thousand, seven hundred thirty-eight".