2643890 has 16 divisors (see below), whose sum is σ = 4777920. Its totient is φ = 1053360.

The previous prime is 2643889. The next prime is 2643899. The reversal of 2643890 is 983462.

2643890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2643899) 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 7 ways as a sum of consecutive naturals, for example, 3875 + ... + 4505.

It is an arithmetic number, because the mean of its divisors is an integer number (298620).

2^2643890 is an apocalyptic number.

2643890 is a deficient number, since it is larger than the sum of its proper divisors (2134030).

2643890 is a wasteful number, since it uses less digits than its factorization.

2643890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1057.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 2643890 is about 1626.0043050374. The cubic root of 2643890 is about 138.2763139790.

The spelling of 2643890 in words is "two million, six hundred forty-three thousand, eight hundred ninety".