1139973156 has 96 divisors (see below), whose sum is σ = 3449671680. Its totient is φ = 318766752.

The previous prime is 1139973103. The next prime is 1139973157. The reversal of 1139973156 is 6513799311.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1139973157) 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, 19491 + ... + 51573.

It is an arithmetic number, because the mean of its divisors is an integer number (35934080).

Almost surely, 2^1139973156 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 1139973156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1724835840).

1139973156 is an abundant number, since it is smaller than the sum of its proper divisors (2309698524).

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

1139973156 is a wasteful number, since it uses less digits than its factorization.

1139973156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32150 (or 32142 counting only the distinct ones).

The product of its digits is 153090, while the sum is 45.

The square root of 1139973156 is about 33763.4885045962. The cubic root of 1139973156 is about 1044.6357272195.

The spelling of 1139973156 in words is "one billion, one hundred thirty-nine million, nine hundred seventy-three thousand, one hundred fifty-six".