2565988 has 18 divisors (see below), whose sum is σ = 4741926. Its totient is φ = 1214784.

The previous prime is 2565947. The next prime is 2565989. The reversal of 2565988 is 8895652.

2565988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2196324 + 369664 = 1482^2 + 608^2 .

It is a super-2 number, since 2×2565988² = 13168588832288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2565989) 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 5 ways as a sum of consecutive naturals, for example, 556 + ... + 2332.

2^2565988 is an apocalyptic number.

It is an amenable number.

2565988 is a deficient number, since it is larger than the sum of its proper divisors (2175938).

2565988 is a wasteful number, since it uses less digits than its factorization.

2565988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1819 (or 1798 counting only the distinct ones).

The product of its digits is 172800, while the sum is 43.

The square root of 2565988 is about 1601.8701570352. The cubic root of 2565988 is about 136.9046524304.

It can be divided in two parts, 2565 and 988, that added together give a palindrome (3553).

The spelling of 2565988 in words is "two million, five hundred sixty-five thousand, nine hundred eighty-eight".