3261638 has 16 divisors (see below), whose sum is σ = 5037120. Its totient is φ = 1583400.

The previous prime is 3261631. The next prime is 3261641. The reversal of 3261638 is 8361623.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3261638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3261631) 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, 15353 + ... + 15563.

It is an arithmetic number, because the mean of its divisors is an integer number (314820).

Almost surely, 2^3261638 is an apocalyptic number.

3261638 is a deficient number, since it is larger than the sum of its proper divisors (1775482).

3261638 is a wasteful number, since it uses less digits than its factorization.

3261638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403.

The product of its digits is 5184, while the sum is 29.

The square root of 3261638 is about 1806.0005537098. Note that the first 3 decimals coincide. The cubic root of 3261638 is about 148.3014006364.

The spelling of 3261638 in words is "three million, two hundred sixty-one thousand, six hundred thirty-eight".