1161488140 has 12 divisors (see below), whose sum is σ = 2439125136. Its totient is φ = 464595248.

The previous prime is 1161488123. The next prime is 1161488147. The reversal of 1161488140 is 418841611.

It is a junction number, because it is equal to n+sod(n) for n = 1161488096 and 1161488105.

It is not an unprimeable number, because it can be changed into a prime (1161488147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29037184 + ... + 29037223.

It is an arithmetic number, because the mean of its divisors is an integer number (203260428).

Almost surely, 2^1161488140 is an apocalyptic number.

1161488140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1161488140 is an abundant number, since it is smaller than the sum of its proper divisors (1277636996).

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

1161488140 is a wasteful number, since it uses less digits than its factorization.

1161488140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58074416 (or 58074414 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 34.

The square root of 1161488140 is about 34080.6123771273. The cubic root of 1161488140 is about 1051.1666971090.

The spelling of 1161488140 in words is "one billion, one hundred sixty-one million, four hundred eighty-eight thousand, one hundred forty".