2638863 has 6 divisors (see below), whose sum is σ = 3811704. Its totient is φ = 1759236.

The previous prime is 2638849. The next prime is 2638873. The reversal of 2638863 is 3688362.

It is not a de Polignac number, because 2638863 - 2⁸ = 2638607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2638843) 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, 146595 + ... + 146612.

It is an arithmetic number, because the mean of its divisors is an integer number (635284).

2^2638863 is an apocalyptic number.

2638863 is a deficient number, since it is larger than the sum of its proper divisors (1172841).

2638863 is a wasteful number, since it uses less digits than its factorization.

2638863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293213 (or 293210 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 2638863 is about 1624.4577556834. The cubic root of 2638863 is about 138.1886204602.

The spelling of 2638863 in words is "two million, six hundred thirty-eight thousand, eight hundred sixty-three".