686024420 has 24 divisors (see below), whose sum is σ = 1487125248. Its totient is φ = 265557600.

The previous prime is 686024419. The next prime is 686024453. The reversal of 686024420 is 24420686.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 552626 + ... + 553865.

It is an arithmetic number, because the mean of its divisors is an integer number (61963552).

Almost surely, 2^686024420 is an apocalyptic number.

It is an amenable number.

686024420 is an abundant number, since it is smaller than the sum of its proper divisors (801100828).

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

686024420 is a wasteful number, since it uses less digits than its factorization.

686024420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106531 (or 1106529 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 686024420 is about 26192.0678832352. The cubic root of 686024420 is about 881.9551998608.

The spelling of 686024420 in words is "six hundred eighty-six million, twenty-four thousand, four hundred twenty".