1163223620 has 96 divisors (see below), whose sum is σ = 2763694080. Its totient is φ = 410467200.

The previous prime is 1163223617. The next prime is 1163223629. The reversal of 1163223620 is 263223611.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 1163223620.

It is not an unprimeable number, because it can be changed into a prime (1163223629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1010045 + ... + 1011195.

It is an arithmetic number, because the mean of its divisors is an integer number (28788480).

Almost surely, 2^1163223620 is an apocalyptic number.

1163223620 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 1163223620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1381847040).

1163223620 is an abundant number, since it is smaller than the sum of its proper divisors (1600470460).

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

1163223620 is a wasteful number, since it uses less digits than its factorization.

1163223620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222 (or 1194 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 1163223620 is about 34106.0642701558. The cubic root of 1163223620 is about 1051.6899829599.

Subtracting from 1163223620 its reverse (263223611), we obtain a palindrome (900000009).

The spelling of 1163223620 in words is "one billion, one hundred sixty-three million, two hundred twenty-three thousand, six hundred twenty".