1161441288 has 256 divisors, whose sum is σ = 3870720000. Its totient is φ = 315705600.

The previous prime is 1161441263. The next prime is 1161441371. The reversal of 1161441288 is 8821441611.

1161441288 is a `hidden beast` number, since 1 + 161 + 4 + 412 + 88 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3327738 + ... + 3328086.

It is an arithmetic number, because the mean of its divisors is an integer number (15120000).

Almost surely, 2^1161441288 is an apocalyptic number.

1161441288 is a gapful number since it is divisible by the number (18) 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 1161441288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1935360000).

1161441288 is an abundant number, since it is smaller than the sum of its proper divisors (2709278712).

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

1161441288 is a wasteful number, since it uses less digits than its factorization.

1161441288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473 (or 463 counting only the distinct ones).

The product of its digits is 12288, while the sum is 36.

The square root of 1161441288 is about 34079.9249999175. The cubic root of 1161441288 is about 1051.1525629643.

Adding to 1161441288 its reverse (8821441611), we get a palindrome (9982882899).

The spelling of 1161441288 in words is "one billion, one hundred sixty-one million, four hundred forty-one thousand, two hundred eighty-eight".