1161647808 has 112 divisors (see below), whose sum is σ = 3265505280. Its totient is φ = 363188224.

The previous prime is 1161647807. The next prime is 1161647813. The reversal of 1161647808 is 8087461611.

It is a self number, because there is not a number n which added to its sum of digits gives 1161647808.

It is not an unprimeable number, because it can be changed into a prime (1161647807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1563085 + ... + 1563827.

Almost surely, 2^1161647808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1161647808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1632752640).

1161647808 is an abundant number, since it is smaller than the sum of its proper divisors (2103857472).

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

1161647808 is a wasteful number, since it uses less digits than its factorization.

1161647808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254 (or 1244 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 1161647808 is about 34082.9548014840. The cubic root of 1161647808 is about 1051.2148623286.

The spelling of 1161647808 in words is "one billion, one hundred sixty-one million, six hundred forty-seven thousand, eight hundred eight".