287678706 has 48 divisors (see below), whose sum is σ = 672826176. Its totient is φ = 81760224.

The previous prime is 287678701. The next prime is 287678711. The reversal of 287678706 is 607876782.

It is an interprime number because it is at equal distance from previous prime (287678701) and next prime (287678711).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287678701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55435 + ... + 60401.

It is an arithmetic number, because the mean of its divisors is an integer number (14017212).

Almost surely, 2^287678706 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 287678706, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336413088).

287678706 is an abundant number, since it is smaller than the sum of its proper divisors (385147470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

287678706 is a wasteful number, since it uses less digits than its factorization.

287678706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5183 (or 5176 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 51.

The square root of 287678706 is about 16961.0938916097. The cubic root of 287678706 is about 660.1397821472.

It can be divided in two parts, 28767 and 8706, that added together give a palindrome (37473).

The spelling of 287678706 in words is "two hundred eighty-seven million, six hundred seventy-eight thousand, seven hundred six".