2006000644 has 24 divisors (see below), whose sum is σ = 3633318360. Its totient is φ = 967943424.

The previous prime is 2006000597. The next prime is 2006000681. The reversal of 2006000644 is 4460006002.

It can be written as a sum of positive squares in 4 ways, for example, as 366722500 + 1639278144 = 19150^2 + 40488^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 414382 + ... + 419194.

It is an arithmetic number, because the mean of its divisors is an integer number (151388265).

Almost surely, 2^2006000644 is an apocalyptic number.

It is an amenable number.

2006000644 is a deficient number, since it is larger than the sum of its proper divisors (1627317716).

2006000644 is a wasteful number, since it uses less digits than its factorization.

2006000644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8439 (or 8437 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 2006000644 is about 44788.3985424797. The cubic root of 2006000644 is about 1261.1798480811.

Adding to 2006000644 its reverse (4460006002), we get a palindrome (6466006646).

The spelling of 2006000644 in words is "two billion, six million, six hundred forty-four", and thus it is an aban number.