686930420 has 48 divisors (see below), whose sum is σ = 1642128768. Its totient is φ = 238930560.

The previous prime is 686930401. The next prime is 686930423. The reversal of 686930420 is 24039686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686930423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62819 + ... + 72938.

It is an arithmetic number, because the mean of its divisors is an integer number (34211016).

Almost surely, 2^686930420 is an apocalyptic number.

It is an amenable number.

686930420 is an abundant number, since it is smaller than the sum of its proper divisors (955198348).

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

686930420 is a wasteful number, since it uses less digits than its factorization.

686930420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135800 (or 135798 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 686930420 is about 26209.3574892633. The cubic root of 686930420 is about 882.3432812415.

The spelling of 686930420 in words is "six hundred eighty-six million, nine hundred thirty thousand, four hundred twenty".