1228739199 has 8 divisors (see below), whose sum is σ = 1638647472. Its totient is φ = 818995200.

The previous prime is 1228739191. The next prime is 1228739201. The reversal of 1228739199 is 9919378221.

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

It is not a de Polignac number, because 1228739199 - 2³ = 1228739191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228739191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22402 + ... + 54399.

It is an arithmetic number, because the mean of its divisors is an integer number (204830934).

Almost surely, 2^1228739199 is an apocalyptic number.

1228739199 is a deficient number, since it is larger than the sum of its proper divisors (409908273).

1228739199 is an equidigital number, since it uses as much as digits as its factorization.

1228739199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82137.

The product of its digits is 489888, while the sum is 51.

The square root of 1228739199 is about 35053.3764279563. The cubic root of 1228739199 is about 1071.0750539578.

The spelling of 1228739199 in words is "one billion, two hundred twenty-eight million, seven hundred thirty-nine thousand, one hundred ninety-nine".