1128228771 has 8 divisors (see below), whose sum is σ = 1509898320. Its totient is φ = 749355872.

The previous prime is 1128228767. The next prime is 1128228779. The reversal of 1128228771 is 1778228211.

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

It is a cyclic number.

It is not a de Polignac number, because 1128228771 - 2² = 1128228767 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1128228779) 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, 698220 + ... + 699833.

It is an arithmetic number, because the mean of its divisors is an integer number (188737290).

Almost surely, 2^1128228771 is an apocalyptic number.

1128228771 is a deficient number, since it is larger than the sum of its proper divisors (381669549).

1128228771 is a wasteful number, since it uses less digits than its factorization.

1128228771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398325.

The product of its digits is 25088, while the sum is 39.

The square root of 1128228771 is about 33589.1168535286. The cubic root of 1128228771 is about 1041.0359410705.

The spelling of 1128228771 in words is "one billion, one hundred twenty-eight million, two hundred twenty-eight thousand, seven hundred seventy-one".