686142910 has 8 divisors (see below), whose sum is σ = 1235057256. Its totient is φ = 274457160.

The previous prime is 686142883. The next prime is 686142917. The reversal of 686142910 is 19241686.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 686142910.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686142917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34307136 + ... + 34307155.

It is an arithmetic number, because the mean of its divisors is an integer number (154382157).

Almost surely, 2^686142910 is an apocalyptic number.

686142910 is a deficient number, since it is larger than the sum of its proper divisors (548914346).

686142910 is a wasteful number, since it uses less digits than its factorization.

686142910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68614298.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 686142910 is about 26194.3297299244. The cubic root of 686142910 is about 882.0059739793.

The spelling of 686142910 in words is "six hundred eighty-six million, one hundred forty-two thousand, nine hundred ten".