1128271680 has 560 divisors, whose sum is σ = 4425696000. Its totient is φ = 271724544.

The previous prime is 1128271667. The next prime is 1128271681. The reversal of 1128271680 is 861728211.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128271681) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 14281881 + ... + 14281959.

Almost surely, 2^1128271680 is an apocalyptic number.

1128271680 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 1128271680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2212848000).

1128271680 is an abundant number, since it is smaller than the sum of its proper divisors (3297424320).

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

1128271680 is a wasteful number, since it uses less digits than its factorization.

1128271680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The square root of 1128271680 is about 33589.7555811292. The cubic root of 1128271680 is about 1041.0491385254.

Adding to 1128271680 its reverse (861728211), we get a palindrome (1989999891).

The spelling of 1128271680 in words is "one billion, one hundred twenty-eight million, two hundred seventy-one thousand, six hundred eighty".