1128201765 has 32 divisors (see below), whose sum is σ = 1837816320. Its totient is φ = 590893056.

The previous prime is 1128201757. The next prime is 1128201791. The reversal of 1128201765 is 5671028211.

It is not a de Polignac number, because 1128201765 - 2³ = 1128201757 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 226239 + ... + 231171.

It is an arithmetic number, because the mean of its divisors is an integer number (57431760).

Almost surely, 2^1128201765 is an apocalyptic number.

1128201765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1128201765 is a deficient number, since it is larger than the sum of its proper divisors (709614555).

1128201765 is a wasteful number, since it uses less digits than its factorization.

1128201765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5213.

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 1128201765 is about 33588.7148459122. The cubic root of 1128201765 is about 1041.0276347052.

Adding to 1128201765 its reverse (5671028211), we get a palindrome (6799229976).

The spelling of 1128201765 in words is "one billion, one hundred twenty-eight million, two hundred one thousand, seven hundred sixty-five".