1161441340 has 12 divisors (see below), whose sum is σ = 2439026856. Its totient is φ = 464576528.

The previous prime is 1161441263. The next prime is 1161441371. The reversal of 1161441340 is 431441611.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29036014 + ... + 29036053.

It is an arithmetic number, because the mean of its divisors is an integer number (203252238).

Almost surely, 2^1161441340 is an apocalyptic number.

1161441340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1161441340 is an abundant number, since it is smaller than the sum of its proper divisors (1277585516).

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

1161441340 is a wasteful number, since it uses less digits than its factorization.

1161441340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58072076 (or 58072074 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1161441340 is about 34079.9257628299. The cubic root of 1161441340 is about 1051.1525786517.

Adding to 1161441340 its reverse (431441611), we get a palindrome (1592882951).

The spelling of 1161441340 in words is "one billion, one hundred sixty-one million, four hundred forty-one thousand, three hundred forty".