686041078 has 8 divisors (see below), whose sum is σ = 1029369168. Its totient is φ = 342918024.

The previous prime is 686041061. The next prime is 686041117. The reversal of 686041078 is 870140686.

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 686041078.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42601 + ... + 56452.

It is an arithmetic number, because the mean of its divisors is an integer number (128671146).

Almost surely, 2^686041078 is an apocalyptic number.

686041078 is a deficient number, since it is larger than the sum of its proper divisors (343328090).

686041078 is a wasteful number, since it uses less digits than its factorization.

686041078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102518.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 686041078 is about 26192.3858783426. The cubic root of 686041078 is about 881.9623383291.

The spelling of 686041078 in words is "six hundred eighty-six million, forty-one thousand, seventy-eight".