1128228899 has 4 divisors (see below), whose sum is σ = 1289404464. Its totient is φ = 967053336.

The previous prime is 1128228887. The next prime is 1128228923. The reversal of 1128228899 is 9988228211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1128228899 - 2¹² = 1128224803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1128228859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80587772 + ... + 80587785.

It is an arithmetic number, because the mean of its divisors is an integer number (322351116).

Almost surely, 2^1128228899 is an apocalyptic number.

1128228899 is a deficient number, since it is larger than the sum of its proper divisors (161175565).

1128228899 is an equidigital number, since it uses as much as digits as its factorization.

1128228899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161175564.

The product of its digits is 331776, while the sum is 50.

The square root of 1128228899 is about 33589.1187589076. The cubic root of 1128228899 is about 1041.0359804398.

The spelling of 1128228899 in words is "one billion, one hundred twenty-eight million, two hundred twenty-eight thousand, eight hundred ninety-nine".