1128630680 has 64 divisors (see below), whose sum is σ = 2721327840. Its totient is φ = 419756032.

The previous prime is 1128630673. The next prime is 1128630691. The reversal of 1128630680 is 860368211.

It is a self number, because there is not a number n which added to its sum of digits gives 1128630680.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46442 + ... + 66438.

Almost surely, 2^1128630680 is an apocalyptic number.

1128630680 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 1128630680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1360663920).

1128630680 is an abundant number, since it is smaller than the sum of its proper divisors (1592697160).

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

1128630680 is a wasteful number, since it uses less digits than its factorization.

1128630680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20108 (or 20104 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 1128630680 is about 33595.0990473313. The cubic root of 1128630680 is about 1041.1595424926.

Adding to 1128630680 its reverse (860368211), we get a palindrome (1988998891).

The spelling of 1128630680 in words is "one billion, one hundred twenty-eight million, six hundred thirty thousand, six hundred eighty".