1128634560 has 140 divisors (see below), whose sum is σ = 4014843888. Its totient is φ = 300962304.

The previous prime is 1128634553. The next prime is 1128634579. The reversal of 1128634560 is 654368211.

It is a happy number.

1128634560 is a `hidden beast` number, since 1 + 12 + 8 + 634 + 5 + 6 + 0 = 666.

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

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 19 ways as a sum of consecutive naturals, for example, 4149 + ... + 47691.

Almost surely, 2^1128634560 is an apocalyptic number.

1128634560 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 1128634560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2007421944).

1128634560 is an abundant number, since it is smaller than the sum of its proper divisors (2886209328).

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

1128634560 is an equidigital number, since it uses as much as digits as its factorization.

1128634560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43572 (or 43553 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1128634560 is about 33595.1567937999. The cubic root of 1128634560 is about 1041.1607355886.

The spelling of 1128634560 in words is "one billion, one hundred twenty-eight million, six hundred thirty-four thousand, five hundred sixty".