684122112 has 140 divisors (see below), whose sum is σ = 2045777976. Its totient is φ = 227819520.

The previous prime is 684122077. The next prime is 684122123. The reversal of 684122112 is 211221486.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 663037 + ... + 664067.

Almost surely, 2^684122112 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 684122112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1022888988).

684122112 is an abundant number, since it is smaller than the sum of its proper divisors (1361655864).

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

684122112 is an equidigital number, since it uses as much as digits as its factorization.

684122112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069 (or 1036 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 684122112 is about 26155.7280915672. The cubic root of 684122112 is about 881.1392407653.

Adding to 684122112 its reverse (211221486), we get a palindrome (895343598).

The spelling of 684122112 in words is "six hundred eighty-four million, one hundred twenty-two thousand, one hundred twelve".