2855851020 has 240 divisors, whose sum is σ = 10003327488. Its totient is φ = 676045440.

The previous prime is 2855851013. The next prime is 2855851021. The reversal of 2855851020 is 201585582.

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

It is not an unprimeable number, because it can be changed into a prime (2855851021) 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 79 ways as a sum of consecutive naturals, for example, 764397 + ... + 768123.

Almost surely, 2^2855851020 is an apocalyptic number.

2855851020 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 2855851020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5001663744).

2855851020 is an abundant number, since it is smaller than the sum of its proper divisors (7147476468).

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

2855851020 is a wasteful number, since it uses less digits than its factorization.

2855851020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3802 (or 3791 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 36.

The square root of 2855851020 is about 53440.1629862784. The cubic root of 2855851020 is about 1418.7695185914.

The spelling of 2855851020 in words is "two billion, eight hundred fifty-five million, eight hundred fifty-one thousand, twenty".