287426 has 8 divisors (see below), whose sum is σ = 434700. Its totient is φ = 142528.

The previous prime is 287393. The next prime is 287437. The reversal of 287426 is 624782.

It can be written as a sum of positive squares in 2 ways, for example, as 265225 + 22201 = 515^2 + 149^2 .

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

It is a super-2 number, since 2×287426² = 165227410952, which contains 22 as substring.

It is an unprimeable 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 3 ways as a sum of consecutive naturals, for example, 251 + ... + 798.

2²⁸⁷⁴²⁶ is an apocalyptic number.

287426 is a deficient number, since it is larger than the sum of its proper divisors (147274).

287426 is a wasteful number, since it uses less digits than its factorization.

287426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188.

The product of its digits is 5376, while the sum is 29.

The square root of 287426 is about 536.1212549415. The cubic root of 287426 is about 65.9946429689.

The spelling of 287426 in words is "two hundred eighty-seven thousand, four hundred twenty-six".