1644342006 has 16 divisors (see below), whose sum is σ = 3337769664. Its totient is φ = 539933064.

The previous prime is 1644342001. The next prime is 1644342043. The reversal of 1644342006 is 6002434461.

It is a super-3 number, since 3×1644342006³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1644342001) 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, 2044800 + ... + 2045603.

It is an arithmetic number, because the mean of its divisors is an integer number (208610604).

Almost surely, 2^1644342006 is an apocalyptic number.

1644342006 is an abundant number, since it is smaller than the sum of its proper divisors (1693427658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1644342006 is a wasteful number, since it uses less digits than its factorization.

1644342006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4090475.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 1644342006 is about 40550.4871240778. The cubic root of 1644342006 is about 1180.3135253265.

Adding to 1644342006 its reverse (6002434461), we get a palindrome (7646776467).

The spelling of 1644342006 in words is "one billion, six hundred forty-four million, three hundred forty-two thousand, six".