686246228 has 12 divisors (see below), whose sum is σ = 1221286080. Its totient is φ = 337307352.

The previous prime is 686246213. The next prime is 686246261. The reversal of 686246228 is 822642686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1453676 + ... + 1454147.

It is an arithmetic number, because the mean of its divisors is an integer number (101773840).

Almost surely, 2^686246228 is an apocalyptic number.

It is an amenable number.

686246228 is a deficient number, since it is larger than the sum of its proper divisors (535039852).

686246228 is a wasteful number, since it uses less digits than its factorization.

686246228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2907886 (or 2907884 counting only the distinct ones).

The product of its digits is 442368, while the sum is 44.

The square root of 686246228 is about 26196.3018000633. The cubic root of 686246228 is about 882.0502419777.

The spelling of 686246228 in words is "six hundred eighty-six million, two hundred forty-six thousand, two hundred twenty-eight".