2857122720 has 480 divisors, whose sum is σ = 10911257280. Its totient is φ = 701706240.

The previous prime is 2857122661. The next prime is 2857122757. The reversal of 2857122720 is 272217582.

It is a tau number, because it is divible by the number of its divisors (480).

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 79 ways as a sum of consecutive naturals, for example, 10095699 + ... + 10095981.

It is an arithmetic number, because the mean of its divisors is an integer number (22731786).

Almost surely, 2^2857122720 is an apocalyptic number.

2857122720 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 2857122720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5455628640).

2857122720 is an abundant number, since it is smaller than the sum of its proper divisors (8054134560).

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

2857122720 is a wasteful number, since it uses less digits than its factorization.

2857122720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370 (or 353 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The square root of 2857122720 is about 53452.0600164297. The cubic root of 2857122720 is about 1418.9800782975.

The spelling of 2857122720 in words is "two billion, eight hundred fifty-seven million, one hundred twenty-two thousand, seven hundred twenty".