686485228 has 96 divisors (see below), whose sum is σ = 1505806848. Its totient is φ = 269030400.

The previous prime is 686485223. The next prime is 686485231. The reversal of 686485228 is 822584686.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (686485223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2207193 + ... + 2207503.

It is an arithmetic number, because the mean of its divisors is an integer number (15685488).

Almost surely, 2^686485228 is an apocalyptic number.

686485228 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

686485228 is an abundant number, since it is smaller than the sum of its proper divisors (819321620).

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

686485228 is a wasteful number, since it uses less digits than its factorization.

686485228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583 (or 581 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 49.

The square root of 686485228 is about 26200.8631155540. The cubic root of 686485228 is about 882.1526277448.

The spelling of 686485228 in words is "six hundred eighty-six million, four hundred eighty-five thousand, two hundred twenty-eight".