2855988 has 18 divisors (see below), whose sum is σ = 7219394. Its totient is φ = 951984.

The previous prime is 2855953. The next prime is 2855989. The reversal of 2855988 is 8895582.

It can be written as a sum of positive squares in only one way, i.e., 2396304 + 459684 = 1548^2 + 678^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×2855988² = 16313334912288, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2855989) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39631 + ... + 39702.

2^2855988 is an apocalyptic number.

It is an amenable number.

2855988 is an abundant number, since it is smaller than the sum of its proper divisors (4363406).

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

2855988 is a wasteful number, since it uses less digits than its factorization.

2855988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79343 (or 79338 counting only the distinct ones).

The product of its digits is 230400, while the sum is 45.

The square root of 2855988 is about 1689.9668635805. The cubic root of 2855988 is about 141.8792201841.

The spelling of 2855988 in words is "two million, eight hundred fifty-five thousand, nine hundred eighty-eight".