1139665996 has 48 divisors (see below), whose sum is σ = 2341011456. Its totient is φ = 475360704.

The previous prime is 1139665993. The next prime is 1139665997. The reversal of 1139665996 is 6995669311.

It is not an unprimeable number, because it can be changed into a prime (1139665993) 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 15 ways as a sum of consecutive naturals, for example, 185445 + ... + 191491.

It is an arithmetic number, because the mean of its divisors is an integer number (48771072).

Almost surely, 2^1139665996 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1139665996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1170505728).

1139665996 is an abundant number, since it is smaller than the sum of its proper divisors (1201345460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1139665996 is a wasteful number, since it uses less digits than its factorization.

1139665996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6238 (or 6236 counting only the distinct ones).

The product of its digits is 2361960, while the sum is 55.

The square root of 1139665996 is about 33758.9394975612. The cubic root of 1139665996 is about 1044.5418948541.

The spelling of 1139665996 in words is "one billion, one hundred thirty-nine million, six hundred sixty-five thousand, nine hundred ninety-six".