2857634881 has 4 divisors (see below), whose sum is σ = 2859863472. Its totient is φ = 2855406292.

The previous prime is 2857634869. The next prime is 2857634911. The reversal of 2857634881 is 1884367582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2857634881 - 2⁷ = 2857634753 is a prime.

It is a super-2 number, since 2×2857634881² = 16332154226215768322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2857634831) 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 3 ways as a sum of consecutive naturals, for example, 1112371 + ... + 1114936.

It is an arithmetic number, because the mean of its divisors is an integer number (714965868).

Almost surely, 2^2857634881 is an apocalyptic number.

It is an amenable number.

2857634881 is a deficient number, since it is larger than the sum of its proper divisors (2228591).

2857634881 is a wasteful number, since it uses less digits than its factorization.

2857634881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2228590.

The product of its digits is 2580480, while the sum is 52.

The square root of 2857634881 is about 53456.8506461052. The cubic root of 2857634881 is about 1419.0648608925.

The spelling of 2857634881 in words is "two billion, eight hundred fifty-seven million, six hundred thirty-four thousand, eight hundred eighty-one".