287378 has 16 divisors (see below), whose sum is σ = 530880. Its totient is φ = 113616.

The previous prime is 287347. The next prime is 287383. The reversal of 287378 is 873782.

It is a happy number.

It is a super-2 number, since 2×287378² = 165172229768, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 287378.

It is an unprimeable number.

287378 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 7 ways as a sum of consecutive naturals, for example, 608 + ... + 971.

It is an arithmetic number, because the mean of its divisors is an integer number (33180).

2²⁸⁷³⁷⁸ is an apocalyptic number.

287378 is a deficient number, since it is larger than the sum of its proper divisors (243502).

287378 is a wasteful number, since it uses less digits than its factorization.

287378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601.

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

The square root of 287378 is about 536.0764870800. The cubic root of 287378 is about 65.9909690735.

The spelling of 287378 in words is "two hundred eighty-seven thousand, three hundred seventy-eight".