1123271644 has 24 divisors (see below), whose sum is σ = 2146838400. Its totient is φ = 510004080.

The previous prime is 1123271609. The next prime is 1123271647. The reversal of 1123271644 is 4461723211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123271647) 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, 26547 + ... + 54325.

It is an arithmetic number, because the mean of its divisors is an integer number (89451600).

Almost surely, 2^1123271644 is an apocalyptic number.

It is an amenable number.

1123271644 is a deficient number, since it is larger than the sum of its proper divisors (1023566756).

1123271644 is a wasteful number, since it uses less digits than its factorization.

1123271644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28713 (or 28711 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 1123271644 is about 33515.2449491273. The cubic root of 1123271644 is about 1039.5090273760.

Adding to 1123271644 its reverse (4461723211), we get a palindrome (5584994855).

The spelling of 1123271644 in words is "one billion, one hundred twenty-three million, two hundred seventy-one thousand, six hundred forty-four".