1128647238 has 32 divisors (see below), whose sum is σ = 2392558560. Its totient is φ = 353717760.

The previous prime is 1128647213. The next prime is 1128647239. The reversal of 1128647238 is 8327468211.

It is a self number, because there is not a number n which added to its sum of digits gives 1128647238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128647239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103008 + ... + 113436.

It is an arithmetic number, because the mean of its divisors is an integer number (74767455).

Almost surely, 2^1128647238 is an apocalyptic number.

1128647238 is an abundant number, since it is smaller than the sum of its proper divisors (1263911322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1128647238 is a wasteful number, since it uses less digits than its factorization.

1128647238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11512.

The product of its digits is 129024, while the sum is 42.

The square root of 1128647238 is about 33595.3454811824. The cubic root of 1128647238 is about 1041.1646340416.

The spelling of 1128647238 in words is "one billion, one hundred twenty-eight million, six hundred forty-seven thousand, two hundred thirty-eight".