287945 has 16 divisors (see below), whose sum is σ = 416640. Its totient is φ = 186624.

The previous prime is 287939. The next prime is 287977. The reversal of 287945 is 549782.

287945 = T₆ + T₇ + ... + T₁₁₉.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 287945 - 2⁸ = 287689 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 449 + ... + 881.

It is an arithmetic number, because the mean of its divisors is an integer number (26040).

2²⁸⁷⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

287945 is a deficient number, since it is larger than the sum of its proper divisors (128695).

287945 is a wasteful number, since it uses less digits than its factorization.

287945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464.

The product of its digits is 20160, while the sum is 35.

The square root of 287945 is about 536.6050689287. The cubic root of 287945 is about 66.0343408677.

The spelling of 287945 in words is "two hundred eighty-seven thousand, nine hundred forty-five".