2866638 has 32 divisors (see below), whose sum is σ = 6031872. Its totient is φ = 907200.

The previous prime is 2866627. The next prime is 2866657. The reversal of 2866638 is 8366682.

It is a super-2 number, since 2×2866638² = 16435226846088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2866596 and 2866605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10443 + ... + 10713.

It is an arithmetic number, because the mean of its divisors is an integer number (188496).

2^2866638 is an apocalyptic number.

2866638 is an abundant number, since it is smaller than the sum of its proper divisors (3165234).

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

2866638 is a wasteful number, since it uses less digits than its factorization.

2866638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360.

The product of its digits is 82944, while the sum is 39.

The square root of 2866638 is about 1693.1148809221. The cubic root of 2866638 is about 142.0553576401.

It can be divided in two parts, 28 and 66638, that added together give a palindrome (66666).

The spelling of 2866638 in words is "two million, eight hundred sixty-six thousand, six hundred thirty-eight".