2001002806 has 24 divisors (see below), whose sum is σ = 3422941704. Its totient is φ = 869996160.

The previous prime is 2001002791. The next prime is 2001002819. The reversal of 2001002806 is 6082001002.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74331 + ... + 97606.

It is an arithmetic number, because the mean of its divisors is an integer number (142622571).

Almost surely, 2^2001002806 is an apocalyptic number.

2001002806 is a deficient number, since it is larger than the sum of its proper divisors (1421938898).

2001002806 is a wasteful number, since it uses less digits than its factorization.

2001002806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171996 (or 171973 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 2001002806 is about 44732.5698568727. The cubic root of 2001002806 is about 1260.1315907749.

Adding to 2001002806 its reverse (6082001002), we get a palindrome (8083003808).

The spelling of 2001002806 in words is "two billion, one million, two thousand, eight hundred six".