1128238645 has 8 divisors (see below), whose sum is σ = 1397560320. Its totient is φ = 873474960.

The previous prime is 1128238637. The next prime is 1128238673. The reversal of 1128238645 is 5468328211.

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

It is not a de Polignac number, because 1128238645 - 2³ = 1128238637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1128238598 and 1128238607.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3639325 + ... + 3639634.

It is an arithmetic number, because the mean of its divisors is an integer number (174695040).

Almost surely, 2^1128238645 is an apocalyptic number.

It is an amenable number.

1128238645 is a deficient number, since it is larger than the sum of its proper divisors (269321675).

1128238645 is an equidigital number, since it uses as much as digits as its factorization.

1128238645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7278995.

The product of its digits is 92160, while the sum is 40.

The square root of 1128238645 is about 33589.2638353388. The cubic root of 1128238645 is about 1041.0389780311.

The spelling of 1128238645 in words is "one billion, one hundred twenty-eight million, two hundred thirty-eight thousand, six hundred forty-five".