287434 has 16 divisors (see below), whose sum is σ = 504000. Its totient is φ = 122892.

The previous prime is 287393. The next prime is 287437. The reversal of 287434 is 434782.

It is a d-powerful number, because it can be written as 2¹³ + 8 + 4⁴ + 7⁵ + 3³ + 4⁹ .

It is not an unprimeable number, because it can be changed into a prime (287437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477 + ... + 895.

It is an arithmetic number, because the mean of its divisors is an integer number (31500).

287434 is a Friedman number, since it can be written as 7^3*(842-4), using all its digits and the basic arithmetic operations.

2²⁸⁷⁴³⁴ is an apocalyptic number.

287434 is a deficient number, since it is larger than the sum of its proper divisors (216566).

287434 is an equidigital number, since it uses as much as digits as its factorization.

287434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442 (or 428 counting only the distinct ones).

The product of its digits is 5376, while the sum is 28.

The square root of 287434 is about 536.1287158883. The cubic root of 287434 is about 65.9952552451.

The spelling of 287434 in words is "two hundred eighty-seven thousand, four hundred thirty-four".