1161535320 has 192 divisors, whose sum is σ = 4150167840. Its totient is φ = 279398400.

The previous prime is 1161535313. The next prime is 1161535369. The reversal of 1161535320 is 235351611.

1161535320 is a `hidden beast` number, since 11 + 615 + 3 + 5 + 32 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 541450 + ... + 543590.

Almost surely, 2^1161535320 is an apocalyptic number.

1161535320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1161535320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2075083920).

1161535320 is an abundant number, since it is smaller than the sum of its proper divisors (2988632520).

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

1161535320 is a wasteful number, since it uses less digits than its factorization.

1161535320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2306 (or 2299 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 1161535320 is about 34081.3045524962. The cubic root of 1161535320 is about 1051.1809298195.

Adding to 1161535320 its reverse (235351611), we get a palindrome (1396886931).

The spelling of 1161535320 in words is "one billion, one hundred sixty-one million, five hundred thirty-five thousand, three hundred twenty".