686840970 has 32 divisors (see below), whose sum is σ = 1745385408. Its totient is φ = 172383488.

The previous prime is 686840963. The next prime is 686840971. The reversal of 686840970 is 79048686.

It is not an unprimeable number, because it can be changed into a prime (686840971) 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 15 ways as a sum of consecutive naturals, for example, 672864 + ... + 673883.

It is an arithmetic number, because the mean of its divisors is an integer number (54543294).

Almost surely, 2^686840970 is an apocalyptic number.

686840970 is an abundant number, since it is smaller than the sum of its proper divisors (1058544438).

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

686840970 is a wasteful number, since it uses less digits than its factorization.

686840970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346774.

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 686840970 is about 26207.6509821083. The cubic root of 686840970 is about 882.3049808886.

The spelling of 686840970 in words is "six hundred eighty-six million, eight hundred forty thousand, nine hundred seventy".