1128831553 has 8 divisors (see below), whose sum is σ = 1203286400. Its totient is φ = 1055881008.

The previous prime is 1128831547. The next prime is 1128831563. The reversal of 1128831553 is 3551388211.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1128831553 - 2⁵ = 1128831521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1128831523) 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 7 ways as a sum of consecutive naturals, for example, 374526 + ... + 377527.

It is an arithmetic number, because the mean of its divisors is an integer number (150410800).

Almost surely, 2^1128831553 is an apocalyptic number.

It is an amenable number.

1128831553 is a deficient number, since it is larger than the sum of its proper divisors (74454847).

1128831553 is an equidigital number, since it uses as much as digits as its factorization.

1128831553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752151.

The product of its digits is 28800, while the sum is 37.

The square root of 1128831553 is about 33598.0885319388. The cubic root of 1128831553 is about 1041.2213071419.

The spelling of 1128831553 in words is "one billion, one hundred twenty-eight million, eight hundred thirty-one thousand, five hundred fifty-three".