686828428 has 36 divisors (see below), whose sum is σ = 1422791440. Its totient is φ = 288177120.

The previous prime is 686828419. The next prime is 686828453. The reversal of 686828428 is 824828686.

It is a Harshad number since it is a multiple of its sum of digits (52).

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 11 ways as a sum of consecutive naturals, for example, 48288 + ... + 60871.

Almost surely, 2^686828428 is an apocalyptic number.

It is an amenable number.

686828428 is an abundant number, since it is smaller than the sum of its proper divisors (735963012).

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

686828428 is a wasteful number, since it uses less digits than its factorization.

686828428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109198 (or 109185 counting only the distinct ones).

The product of its digits is 2359296, while the sum is 52.

The square root of 686828428 is about 26207.4116997463. The cubic root of 686828428 is about 882.2996104380.

The spelling of 686828428 in words is "six hundred eighty-six million, eight hundred twenty-eight thousand, four hundred twenty-eight".