2857807872 has 104 divisors (see below), whose sum is σ = 8466872880. Its totient is φ = 952565760.

The previous prime is 2857807861. The next prime is 2857807873. The reversal of 2857807872 is 2787087582.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (2857807873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97672 + ... + 123512.

Almost surely, 2^2857807872 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 2857807872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4233436440).

2857807872 is an abundant number, since it is smaller than the sum of its proper divisors (5609065008).

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

2857807872 is an equidigital number, since it uses as much as digits as its factorization.

2857807872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25874 (or 25846 counting only the distinct ones).

The product of its (nonzero) digits is 3512320, while the sum is 54.

The square root of 2857807872 is about 53458.4686649365. The cubic root of 2857807872 is about 1419.0934953526.

The spelling of 2857807872 in words is "two billion, eight hundred fifty-seven million, eight hundred seven thousand, eight hundred seventy-two".