2543838 has 16 divisors (see below), whose sum is σ = 5550336. Its totient is φ = 770840.

The previous prime is 2543833. The next prime is 2543843. The reversal of 2543838 is 8383452.

It is an interprime number because it is at equal distance from previous prime (2543833) and next prime (2543843).

It is a super-2 number, since 2×2543838² = 12942223540488, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2543799 and 2543808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19206 + ... + 19337.

It is an arithmetic number, because the mean of its divisors is an integer number (346896).

2^2543838 is an apocalyptic number.

2543838 is an abundant number, since it is smaller than the sum of its proper divisors (3006498).

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

2543838 is a wasteful number, since it uses less digits than its factorization.

2543838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38559.

The product of its digits is 23040, while the sum is 33.

The square root of 2543838 is about 1594.9413782331. The cubic root of 2543838 is about 136.5095861990.

The spelling of 2543838 in words is "two million, five hundred forty-three thousand, eight hundred thirty-eight".