1000636680 has 128 divisors (see below), whose sum is σ = 3069803520. Its totient is φ = 260858880.

The previous prime is 1000636669. The next prime is 1000636699. The reversal of 1000636680 is 866360001.

It is a super-2 number, since 2×1000636680² = 2002547530722844800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1632054 + ... + 1632666.

It is an arithmetic number, because the mean of its divisors is an integer number (23982840).

Almost surely, 2^1000636680 is an apocalyptic number.

1000636680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1000636680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1534901760).

1000636680 is an abundant number, since it is smaller than the sum of its proper divisors (2069166840).

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

1000636680 is a wasteful number, since it uses less digits than its factorization.

1000636680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911 (or 907 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 1000636680 is about 31632.8417945653. The cubic root of 1000636680 is about 1000.2121816424.

Adding to 1000636680 its reverse (866360001), we get a palindrome (1866996681).

The spelling of 1000636680 in words is "one billion, six hundred thirty-six thousand, six hundred eighty".