287407 has 4 divisors (see below), whose sum is σ = 289296. Its totient is φ = 285520.

The previous prime is 287393. The next prime is 287437. The reversal of 287407 is 704782.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 287407 - 2⁷ = 287279 is a prime.

It is a Duffinian number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 694 + ... + 1027.

It is an arithmetic number, because the mean of its divisors is an integer number (72324).

2²⁸⁷⁴⁰⁷ is an apocalyptic number.

287407 is a deficient number, since it is larger than the sum of its proper divisors (1889).

287407 is a wasteful number, since it uses less digits than its factorization.

287407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 287407 is about 536.1035347766. The cubic root of 287407 is about 65.9931887676.

The spelling of 287407 in words is "two hundred eighty-seven thousand, four hundred seven".