2920705128 has 160 divisors (see below), whose sum is σ = 9449732160. Its totient is φ = 832965120.

The previous prime is 2920705121. The next prime is 2920705147. The reversal of 2920705128 is 8215070292.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2920705092 and 2920705101.

It is not an unprimeable number, because it can be changed into a prime (2920705121) 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, 109125 + ... + 133227.

It is an arithmetic number, because the mean of its divisors is an integer number (59060826).

Almost surely, 2^2920705128 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 2920705128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4724866080).

2920705128 is an abundant number, since it is smaller than the sum of its proper divisors (6529027032).

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

2920705128 is a wasteful number, since it uses less digits than its factorization.

2920705128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24149 (or 24136 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 2920705128 is about 54043.5484401237. The cubic root of 2920705128 is about 1429.4289417877.

The spelling of 2920705128 in words is "two billion, nine hundred twenty million, seven hundred five thousand, one hundred twenty-eight".