1163634220 has 48 divisors (see below), whose sum is σ = 2794659840. Its totient is φ = 398683584.

The previous prime is 1163634217. The next prime is 1163634257. The reversal of 1163634220 is 224363611.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 401617 + ... + 404503.

It is an arithmetic number, because the mean of its divisors is an integer number (58222080).

Almost surely, 2^1163634220 is an apocalyptic number.

1163634220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1163634220 is an abundant number, since it is smaller than the sum of its proper divisors (1631025620).

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

1163634220 is a wasteful number, since it uses less digits than its factorization.

1163634220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5782 (or 5780 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 1163634220 is about 34112.0831964276. The cubic root of 1163634220 is about 1051.8137118516.

Adding to 1163634220 its reverse (224363611), we get a palindrome (1387997831).

The spelling of 1163634220 in words is "one billion, one hundred sixty-three million, six hundred thirty-four thousand, two hundred twenty".