1123389290 has 8 divisors (see below), whose sum is σ = 2022100740. Its totient is φ = 449355712.

The previous prime is 1123389287. The next prime is 1123389331. The reversal of 1123389290 is 929833211.

It is a Cunningham number, because it is equal to 33517²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 1123389289 + 1 = 33517^2 + 1^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 56169455 + ... + 56169474.

Almost surely, 2^1123389290 is an apocalyptic number.

1123389290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1123389290 is a deficient number, since it is larger than the sum of its proper divisors (898711450).

1123389290 is a wasteful number, since it uses less digits than its factorization.

1123389290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112338936.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 1123389290 is about 33517.0000149178. Note that the first 4 decimals coincide. The cubic root of 1123389290 is about 1039.5453171462.

The spelling of 1123389290 in words is "one billion, one hundred twenty-three million, three hundred eighty-nine thousand, two hundred ninety".