1139005944 has 48 divisors (see below), whose sum is σ = 3107351520. Its totient is φ = 376894080.

The previous prime is 1139005909. The next prime is 1139005949. The reversal of 1139005944 is 4495009311.

It is a happy number.

It is a super-2 number, since 2×1139005944² = 2594669080934662272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1139005899 and 1139005908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139005949) 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, 47872 + ... + 67599.

It is an arithmetic number, because the mean of its divisors is an integer number (64736490).

Almost surely, 2^1139005944 is an apocalyptic number.

It is an amenable number.

1139005944 is an abundant number, since it is smaller than the sum of its proper divisors (1968345576).

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

1139005944 is a wasteful number, since it uses less digits than its factorization.

1139005944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115620 (or 115613 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 1139005944 is about 33749.1621229328. The cubic root of 1139005944 is about 1044.3402026876.

The spelling of 1139005944 in words is "one billion, one hundred thirty-nine million, five thousand, nine hundred forty-four".