1128664240 has 80 divisors (see below), whose sum is σ = 2885529600. Its totient is φ = 407151360.

The previous prime is 1128664223. The next prime is 1128664241. The reversal of 1128664240 is 424668211.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 1128664196 and 1128664205.

It is not an unprimeable number, because it can be changed into a prime (1128664241) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 106711 + ... + 116809.

It is an arithmetic number, because the mean of its divisors is an integer number (36069120).

Almost surely, 2^1128664240 is an apocalyptic number.

1128664240 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 1128664240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1442764800).

1128664240 is an abundant number, since it is smaller than the sum of its proper divisors (1756865360).

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

1128664240 is a wasteful number, since it uses less digits than its factorization.

1128664240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10250 (or 10244 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 1128664240 is about 33595.5985212349. The cubic root of 1128664240 is about 1041.1698620679.

The spelling of 1128664240 in words is "one billion, one hundred twenty-eight million, six hundred sixty-four thousand, two hundred forty".