2865129120 has 576 divisors, whose sum is σ = 11820017664. Its totient is φ = 618209280.

The previous prime is 2865129097. The next prime is 2865129139. The reversal of 2865129120 is 219215682.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 16561354 + ... + 16561526.

It is an arithmetic number, because the mean of its divisors is an integer number (20520864).

Almost surely, 2^2865129120 is an apocalyptic number.

2865129120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2865129120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5910008832).

2865129120 is an abundant number, since it is smaller than the sum of its proper divisors (8954888544).

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

2865129120 is a wasteful number, since it uses less digits than its factorization.

2865129120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 274 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 2865129120 is about 53526.9009003884. The cubic root of 2865129120 is about 1420.3042923894.

The spelling of 2865129120 in words is "two billion, eight hundred sixty-five million, one hundred twenty-nine thousand, one hundred twenty".