1128120550 has 12 divisors (see below), whose sum is σ = 2098304316. Its totient is φ = 451248200.

The previous prime is 1128120481. The next prime is 1128120551. The reversal of 1128120550 is 550218211.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128120551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11281156 + ... + 11281255.

It is an arithmetic number, because the mean of its divisors is an integer number (174858693).

Almost surely, 2^1128120550 is an apocalyptic number.

1128120550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1128120550 is a deficient number, since it is larger than the sum of its proper divisors (970183766).

1128120550 is a wasteful number, since it uses less digits than its factorization.

1128120550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22562423 (or 22562418 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 25.

The square root of 1128120550 is about 33587.5058615551. The cubic root of 1128120550 is about 1041.0026542184.

Adding to 1128120550 its reverse (550218211), we get a palindrome (1678338761).

The spelling of 1128120550 in words is "one billion, one hundred twenty-eight million, one hundred twenty thousand, five hundred fifty".