686961030 has 64 divisors (see below), whose sum is σ = 1887717888. Its totient is φ = 156729600.

The previous prime is 686961001. The next prime is 686961049. The reversal of 686961030 is 30169686.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 686961030.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 123489 + ... + 128931.

It is an arithmetic number, because the mean of its divisors is an integer number (29495592).

Almost surely, 2^686961030 is an apocalyptic number.

686961030 is an abundant number, since it is smaller than the sum of its proper divisors (1200756858).

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

686961030 is a wasteful number, since it uses less digits than its factorization.

686961030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6061.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 686961030 is about 26209.9414345015. The cubic root of 686961030 is about 882.3563869486.

The spelling of 686961030 in words is "six hundred eighty-six million, nine hundred sixty-one thousand, thirty".