286949681 has 8 divisors (see below), whose sum is σ = 304313184. Its totient is φ = 269640000.

The previous prime is 286949659. The next prime is 286949731. The reversal of 286949681 is 186949682.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-286949681 is a prime.

It is a super-2 number, since 2×286949681² = 164680238852003522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (286949281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2195 + ... + 24056.

It is an arithmetic number, because the mean of its divisors is an integer number (38039148).

Almost surely, 2^286949681 is an apocalyptic number.

It is an amenable number.

286949681 is a deficient number, since it is larger than the sum of its proper divisors (17363503).

286949681 is a wasteful number, since it uses less digits than its factorization.

286949681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26911.

The product of its digits is 1492992, while the sum is 53.

The square root of 286949681 is about 16939.5891626686. The cubic root of 286949681 is about 659.5816762960.

Subtracting from 286949681 its reverse (186949682), we obtain a palindrome (99999999).

The spelling of 286949681 in words is "two hundred eighty-six million, nine hundred forty-nine thousand, six hundred eighty-one".