3123742120 has 64 divisors (see below), whose sum is σ = 7425172800. Its totient is φ = 1179440640.

The previous prime is 3123742109. The next prime is 3123742121. The reversal of 3123742120 is 212473213.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (3123742121) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 206247 + ... + 220873.

It is an arithmetic number, because the mean of its divisors is an integer number (116018325).

Almost surely, 2^3123742120 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 3123742120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3712586400).

3123742120 is an abundant number, since it is smaller than the sum of its proper divisors (4301430680).

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

3123742120 is a wasteful number, since it uses less digits than its factorization.

3123742120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14938 (or 14934 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 3123742120 is about 55890.4474843421. The cubic root of 3123742120 is about 1461.8126793975.

The spelling of 3123742120 in words is "three billion, one hundred twenty-three million, seven hundred forty-two thousand, one hundred twenty".