2855821887 has 32 divisors (see below), whose sum is σ = 4420108800. Its totient is φ = 1818913536.

The previous prime is 2855821879. The next prime is 2855821889. The reversal of 2855821887 is 7881285582.

2855821887 is a `hidden beast` number, since 2 + 8 + 558 + 2 + 1 + 8 + 87 = 666.

2855821887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2855821887 - 2³ = 2855821879 is a prime.

It is a super-3 number, since 3×2855821887³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2855821889) 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, 630543 + ... + 635055.

It is an arithmetic number, because the mean of its divisors is an integer number (138128400).

Almost surely, 2^2855821887 is an apocalyptic number.

2855821887 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2855821887 is a deficient number, since it is larger than the sum of its proper divisors (1564286913).

2855821887 is a wasteful number, since it uses less digits than its factorization.

2855821887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5564 (or 5558 counting only the distinct ones).

The product of its digits is 2867200, while the sum is 54.

The square root of 2855821887 is about 53439.8904096930. The cubic root of 2855821887 is about 1418.7646942089.

The spelling of 2855821887 in words is "two billion, eight hundred fifty-five million, eight hundred twenty-one thousand, eight hundred eighty-seven".