287678842 has 8 divisors (see below), whose sum is σ = 470747232. Its totient is φ = 130763100.

The previous prime is 287678801. The next prime is 287678857. The reversal of 287678842 is 248876782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×287678842² = 165518232268921928, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 287678842.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6538134 + ... + 6538177.

It is an arithmetic number, because the mean of its divisors is an integer number (58843404).

Almost surely, 2^287678842 is an apocalyptic number.

287678842 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

287678842 is a deficient number, since it is larger than the sum of its proper divisors (183068390).

287678842 is a wasteful number, since it uses less digits than its factorization.

287678842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13076324.

The product of its digits is 2408448, while the sum is 52.

The square root of 287678842 is about 16961.0979007846. The cubic root of 287678842 is about 660.1398861741.

It can be divided in two parts, 2876 and 78842, that added together give a palindrome (81718).

The spelling of 287678842 in words is "two hundred eighty-seven million, six hundred seventy-eight thousand, eight hundred forty-two".