1128441555 has 24 divisors (see below), whose sum is σ = 2071023552. Its totient is φ = 566433024.

The previous prime is 1128441527. The next prime is 1128441557. The reversal of 1128441555 is 5551448211.

1128441555 is a `hidden beast` number, since 112 + 84 + 415 + 55 = 666.

It is not a de Polignac number, because 1128441555 - 2⁷ = 1128441427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1128441557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 736779 + ... + 738308.

It is an arithmetic number, because the mean of its divisors is an integer number (86292648).

Almost surely, 2^1128441555 is an apocalyptic number.

1128441555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1128441555 is a deficient number, since it is larger than the sum of its proper divisors (942581997).

1128441555 is a wasteful number, since it uses less digits than its factorization.

1128441555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475115 (or 1475112 counting only the distinct ones).

The product of its digits is 32000, while the sum is 36.

The square root of 1128441555 is about 33592.2841587172. The cubic root of 1128441555 is about 1041.1013834326.

Adding to 1128441555 its reverse (5551448211), we get a palindrome (6679889766).

The spelling of 1128441555 in words is "one billion, one hundred twenty-eight million, four hundred forty-one thousand, five hundred fifty-five".