286478 has 4 divisors (see below), whose sum is σ = 429720. Its totient is φ = 143238.

The previous prime is 286477. The next prime is 286483. The reversal of 286478 is 874682.

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

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 286478.

It is not an unprimeable number, because it can be changed into a prime (286477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71618 + ... + 71621.

It is an arithmetic number, because the mean of its divisors is an integer number (107430).

2²⁸⁶⁴⁷⁸ is an apocalyptic number.

286478 is a deficient number, since it is larger than the sum of its proper divisors (143242).

286478 is a wasteful number, since it uses less digits than its factorization.

286478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143241.

The product of its digits is 21504, while the sum is 35.

The square root of 286478 is about 535.2363963708. The cubic root of 286478 is about 65.9220076583.

The spelling of 286478 in words is "two hundred eighty-six thousand, four hundred seventy-eight".