2857881906 has 64 divisors (see below), whose sum is σ = 7075676160. Its totient is φ = 847590480.

The previous prime is 2857881899. The next prime is 2857881907. The reversal of 2857881906 is 6091887582.

2857881906 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 a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2857881907) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23266 + ... + 79101.

It is an arithmetic number, because the mean of its divisors is an integer number (110557440).

Almost surely, 2^2857881906 is an apocalyptic number.

2857881906 is an abundant number, since it is smaller than the sum of its proper divisors (4217794254).

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

2857881906 is a wasteful number, since it uses less digits than its factorization.

2857881906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102436 (or 102430 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 54.

The square root of 2857881906 is about 53459.1611045291. The cubic root of 2857881906 is about 1419.1057495308.

The spelling of 2857881906 in words is "two billion, eight hundred fifty-seven million, eight hundred eighty-one thousand, nine hundred six".