1123280639 has 12 divisors (see below), whose sum is σ = 1218332016. Its totient is φ = 1035171072.

The previous prime is 1123280623. The next prime is 1123280687. The reversal of 1123280639 is 9360823211.

It is not a de Polignac number, because 1123280639 - 2⁴ = 1123280623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1123280599 and 1123280608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123280699) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104207 + ... + 114479.

It is an arithmetic number, because the mean of its divisors is an integer number (101527668).

Almost surely, 2^1123280639 is an apocalyptic number.

1123280639 is a deficient number, since it is larger than the sum of its proper divisors (95051377).

1123280639 is a wasteful number, since it uses less digits than its factorization.

1123280639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10946 (or 10933 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 1123280639 is about 33515.3791415225. The cubic root of 1123280639 is about 1039.5118021155.

The spelling of 1123280639 in words is "one billion, one hundred twenty-three million, two hundred eighty thousand, six hundred thirty-nine".