1000008646 has 64 divisors (see below), whose sum is σ = 2057771520. Its totient is φ = 352719360.

The previous prime is 1000008637. The next prime is 1000008649. The reversal of 1000008646 is 6468000001.

It is a self number, because there is not a number n which added to its sum of digits gives 1000008646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000008649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50281 + ... + 67291.

It is an arithmetic number, because the mean of its divisors is an integer number (32152680).

Almost surely, 2^1000008646 is an apocalyptic number.

1000008646 is an abundant number, since it is smaller than the sum of its proper divisors (1057762874).

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

1000008646 is a wasteful number, since it uses less digits than its factorization.

1000008646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17069.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1000008646 is about 31622.9133066516. The cubic root of 1000008646 is about 1000.0028819917.

Adding to 1000008646 its reverse (6468000001), we get a palindrome (7468008647).

The spelling of 1000008646 in words is "one billion, eight thousand, six hundred forty-six".