1128198273 has 4 divisors (see below), whose sum is σ = 1504264368. Its totient is φ = 752132180.

The previous prime is 1128198257. The next prime is 1128198299. The reversal of 1128198273 is 3728918211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3728918211 = 3 ⋅1242972737.

It is a cyclic number.

It is not a de Polignac number, because 1128198273 - 2⁴ = 1128198257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1128196273) 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, 188033043 + ... + 188033048.

It is an arithmetic number, because the mean of its divisors is an integer number (376066092).

Almost surely, 2^1128198273 is an apocalyptic number.

It is an amenable number.

1128198273 is a deficient number, since it is larger than the sum of its proper divisors (376066095).

1128198273 is an equidigital number, since it uses as much as digits as its factorization.

1128198273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376066094.

The product of its digits is 48384, while the sum is 42.

The square root of 1128198273 is about 33588.6628641272. The cubic root of 1128198273 is about 1041.0265606443.

The spelling of 1128198273 in words is "one billion, one hundred twenty-eight million, one hundred ninety-eight thousand, two hundred seventy-three".