2857859172 has 120 divisors (see below), whose sum is σ = 8832922560. Its totient is φ = 788356800.

The previous prime is 2857859149. The next prime is 2857859183. The reversal of 2857859172 is 2719587582.

2857859172 is a `hidden beast` number, since 2 + 8 + 578 + 59 + 17 + 2 = 666.

2857859172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 44047 + ... + 87497.

It is an arithmetic number, because the mean of its divisors is an integer number (73607688).

Almost surely, 2^2857859172 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 2857859172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4416461280).

2857859172 is an abundant number, since it is smaller than the sum of its proper divisors (5975063388).

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

2857859172 is a wasteful number, since it uses less digits than its factorization.

2857859172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43503 (or 43492 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 54.

The square root of 2857859172 is about 53458.9484745071. The cubic root of 2857859172 is about 1419.1019866000.

The spelling of 2857859172 in words is "two billion, eight hundred fifty-seven million, eight hundred fifty-nine thousand, one hundred seventy-two".