684951228 has 120 divisors (see below), whose sum is σ = 1944047952. Its totient is φ = 209039616.

The previous prime is 684951221. The next prime is 684951229. The reversal of 684951228 is 822159486.

684951228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684951221) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 576451 + ... + 577637.

Almost surely, 2^684951228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 684951228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (972023976).

684951228 is an abundant number, since it is smaller than the sum of its proper divisors (1259096724).

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

684951228 is a wasteful number, since it uses less digits than its factorization.

684951228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353 (or 1342 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 684951228 is about 26171.5728988534. The cubic root of 684951228 is about 881.4950601401.

The spelling of 684951228 in words is "six hundred eighty-four million, nine hundred fifty-one thousand, two hundred twenty-eight".