1161363840 has 768 divisors, whose sum is σ = 5050321920. Its totient is φ = 220594176.

The previous prime is 1161363839. The next prime is 1161363851. The reversal of 1161363840 is 483631611.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 50494069 + ... + 50494091.

It is an arithmetic number, because the mean of its divisors is an integer number (6575940).

Almost surely, 2^1161363840 is an apocalyptic number.

1161363840 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 1161363840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2525160960).

1161363840 is an abundant number, since it is smaller than the sum of its proper divisors (3888958080).

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

1161363840 is a wasteful number, since it uses less digits than its factorization.

1161363840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 1161363840 is about 34078.7887108682. The cubic root of 1161363840 is about 1051.1291978937.

The spelling of 1161363840 in words is "one billion, one hundred sixty-one million, three hundred sixty-three thousand, eight hundred forty".