1128238267 has 8 divisors (see below), whose sum is σ = 1222767056. Its totient is φ = 1034815392.

The previous prime is 1128238231. The next prime is 1128238289. The reversal of 1128238267 is 7628328211.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-1128238267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1128232267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274353 + ... + 278434.

It is an arithmetic number, because the mean of its divisors is an integer number (152845882).

Almost surely, 2^1128238267 is an apocalyptic number.

1128238267 is a deficient number, since it is larger than the sum of its proper divisors (94528789).

1128238267 is a wasteful number, since it uses less digits than its factorization.

1128238267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552957.

The product of its digits is 64512, while the sum is 40.

The square root of 1128238267 is about 33589.2582085404. The cubic root of 1128238267 is about 1041.0388617694.

The spelling of 1128238267 in words is "one billion, one hundred twenty-eight million, two hundred thirty-eight thousand, two hundred sixty-seven".