2643838 has 4 divisors (see below), whose sum is σ = 3965760. Its totient is φ = 1321918.

The previous prime is 2643833. The next prime is 2643853. The reversal of 2643838 is 8383462.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2643833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660958 + ... + 660961.

It is an arithmetic number, because the mean of its divisors is an integer number (991440).

2^2643838 is an apocalyptic number.

2643838 is a deficient number, since it is larger than the sum of its proper divisors (1321922).

2643838 is a wasteful number, since it uses less digits than its factorization.

2643838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321921.

The product of its digits is 27648, while the sum is 34.

The square root of 2643838 is about 1625.9883148412. The cubic root of 2643838 is about 138.2754074340.

It can be divided in two parts, 2643 and 838, that added together give a square (3481 = 59²).

The spelling of 2643838 in words is "two million, six hundred forty-three thousand, eight hundred thirty-eight".