2856455838 has 48 divisors (see below), whose sum is σ = 6600288240. Its totient is φ = 889682688.

The previous prime is 2856455831. The next prime is 2856455863. The reversal of 2856455838 is 8385546582.

2856455838 is a `hidden beast` number, since 2 + 8 + 56 + 4 + 5 + 583 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2856455831) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8956 + ... + 76112.

It is an arithmetic number, because the mean of its divisors is an integer number (137506005).

Almost surely, 2^2856455838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2856455838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3300144120).

2856455838 is an abundant number, since it is smaller than the sum of its proper divisors (3743832402).

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

2856455838 is a wasteful number, since it uses less digits than its factorization.

2856455838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67321 (or 67318 counting only the distinct ones).

The product of its digits is 9216000, while the sum is 54.

The square root of 2856455838 is about 53445.8215204893. The cubic root of 2856455838 is about 1418.8696681635.

The spelling of 2856455838 in words is "two billion, eight hundred fifty-six million, four hundred fifty-five thousand, eight hundred thirty-eight".