2638886 has 4 divisors (see below), whose sum is σ = 3958332. Its totient is φ = 1319442.

The previous prime is 2638879. The next prime is 2638897. The reversal of 2638886 is 6888362.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659720 + ... + 659723.

It is an arithmetic number, because the mean of its divisors is an integer number (989583).

2^2638886 is an apocalyptic number.

2638886 is a deficient number, since it is larger than the sum of its proper divisors (1319446).

2638886 is a wasteful number, since it uses less digits than its factorization.

2638886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319445.

The product of its digits is 110592, while the sum is 41.

The square root of 2638886 is about 1624.4648349533. The cubic root of 2638886 is about 138.1890219373.

The spelling of 2638886 in words is "two million, six hundred thirty-eight thousand, eight hundred eighty-six".