2857021824 has 128 divisors (see below), whose sum is σ = 7878055680. Its totient is φ = 916715520.

The previous prime is 2857021813. The next prime is 2857021829. The reversal of 2857021824 is 4281207582.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2857021829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1171134 + ... + 1173570.

It is an arithmetic number, because the mean of its divisors is an integer number (61547310).

Almost surely, 2^2857021824 is an apocalyptic number.

2857021824 is a gapful number since it is divisible by the number (24) 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 2857021824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3939027840).

2857021824 is an abundant number, since it is smaller than the sum of its proper divisors (5021033856).

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

2857021824 is a wasteful number, since it uses less digits than its factorization.

2857021824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2568 (or 2556 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 39.

The square root of 2857021824 is about 53451.1162091120. The cubic root of 2857021824 is about 1418.9633748849.

The spelling of 2857021824 in words is "two billion, eight hundred fifty-seven million, twenty-one thousand, eight hundred twenty-four".