2686042731 has 8 divisors (see below), whose sum is σ = 3581698624. Its totient is φ = 1790541000.

The previous prime is 2686042651. The next prime is 2686042747. The reversal of 2686042731 is 1372406862.

It is a happy number.

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

It is not a de Polignac number, because 2686042731 - 2¹⁹ = 2685518443 is a prime.

It is a super-2 number, since 2×2686042731² = 14429651105515876722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2686042731.

It is not an unprimeable number, because it can be changed into a prime (2686042781) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11340 + ... + 74166.

It is an arithmetic number, because the mean of its divisors is an integer number (447712328).

Almost surely, 2^2686042731 is an apocalyptic number.

2686042731 is a deficient number, since it is larger than the sum of its proper divisors (895655893).

2686042731 is a wasteful number, since it uses less digits than its factorization.

2686042731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77081.

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 2686042731 is about 51827.0463271833. The cubic root of 2686042731 is about 1390.0730998597.

The spelling of 2686042731 in words is "two billion, six hundred eighty-six million, forty-two thousand, seven hundred thirty-one".