2791638 has 32 divisors (see below), whose sum is σ = 6570720. Its totient is φ = 875520.

The previous prime is 2791637. The next prime is 2791639. The reversal of 2791638 is 8361972.

2791638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2791637) and next prime (2791639).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2791631) 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 15 ways as a sum of consecutive naturals, for example, 603 + ... + 2438.

It is an arithmetic number, because the mean of its divisors is an integer number (205335).

2^2791638 is an apocalyptic number.

2791638 is an abundant number, since it is smaller than the sum of its proper divisors (3779082).

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

2791638 is a wasteful number, since it uses less digits than its factorization.

2791638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3069 (or 3063 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 2791638 is about 1670.8195593780. The cubic root of 2791638 is about 140.8055263736.

The spelling of 2791638 in words is "two million, seven hundred ninety-one thousand, six hundred thirty-eight".