3221040638 has 4 divisors (see below), whose sum is σ = 4831560960. Its totient is φ = 1610520318.

The previous prime is 3221040637. The next prime is 3221040649. The reversal of 3221040638 is 8360401223.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8360401223 = 19 ⋅440021117.

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 3221040638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221040637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805260158 + ... + 805260161.

It is an arithmetic number, because the mean of its divisors is an integer number (1207890240).

Almost surely, 2^3221040638 is an apocalyptic number.

3221040638 is a deficient number, since it is larger than the sum of its proper divisors (1610520322).

3221040638 is a wasteful number, since it uses less digits than its factorization.

3221040638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1610520321.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 3221040638 is about 56754.2125132576. The cubic root of 3221040638 is about 1476.8353119649.

The spelling of 3221040638 in words is "three billion, two hundred twenty-one million, forty thousand, six hundred thirty-eight".