1128320745 has 8 divisors (see below), whose sum is σ = 1805313216. Its totient is φ = 601771056.

The previous prime is 1128320693. The next prime is 1128320783. The reversal of 1128320745 is 5470238211.

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

It is not a de Polignac number, because 1128320745 - 2⁸ = 1128320489 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37610677 + ... + 37610706.

It is an arithmetic number, because the mean of its divisors is an integer number (225664152).

Almost surely, 2^1128320745 is an apocalyptic number.

1128320745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1128320745 is a deficient number, since it is larger than the sum of its proper divisors (676992471).

1128320745 is an equidigital number, since it uses as much as digits as its factorization.

1128320745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75221391.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 1128320745 is about 33590.4859297986. The cubic root of 1128320745 is about 1041.0642289617.

Adding to 1128320745 its reverse (5470238211), we get a palindrome (6598558956).

The spelling of 1128320745 in words is "one billion, one hundred twenty-eight million, three hundred twenty thousand, seven hundred forty-five".