2561338 has 32 divisors (see below), whose sum is σ = 4435200. Its totient is φ = 1100736.

The previous prime is 2561327. The next prime is 2561341. The reversal of 2561338 is 8331652.

2561338 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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, 32383 + ... + 32461.

It is an arithmetic number, because the mean of its divisors is an integer number (138600).

2^2561338 is an apocalyptic number.

2561338 is a deficient number, since it is larger than the sum of its proper divisors (1873862).

2561338 is a wasteful number, since it uses less digits than its factorization.

2561338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166.

The product of its digits is 4320, while the sum is 28.

The square root of 2561338 is about 1600.4180703804. The cubic root of 2561338 is about 136.8219043730.

It can be divided in two parts, 25613 and 38, that added together give a triangular number (25651 = T₂₂₆).

The spelling of 2561338 in words is "two million, five hundred sixty-one thousand, three hundred thirty-eight".