1139940168 has 128 divisors (see below), whose sum is σ = 3166801920. Its totient is φ = 340116480.

The previous prime is 1139940167. The next prime is 1139940181. The reversal of 1139940168 is 8610499311.

It is a Cunningham number, because it is equal to 33763²-1.

It is not an unprimeable number, because it can be changed into a prime (1139940167) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3105921 + ... + 3106287.

It is an arithmetic number, because the mean of its divisors is an integer number (24740640).

Almost surely, 2^1139940168 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 1139940168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1583400960).

1139940168 is an abundant number, since it is smaller than the sum of its proper divisors (2026861752).

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

1139940168 is a wasteful number, since it uses less digits than its factorization.

1139940168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747 (or 743 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 1139940168 is about 33762.9999851909. Note that the first 4 decimals coincide. The cubic root of 1139940168 is about 1044.6256507320.

The spelling of 1139940168 in words is "one billion, one hundred thirty-nine million, nine hundred forty thousand, one hundred sixty-eight".