1123516620 has 144 divisors (see below), whose sum is σ = 3465352800. Its totient is φ = 294617088.

The previous prime is 1123516613. The next prime is 1123516633. The reversal of 1123516620 is 266153211.

1123516620 is a `hidden beast` number, since 1 + 1 + 2 + 35 + 1 + 6 + 620 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4371532 + ... + 4371788.

It is an arithmetic number, because the mean of its divisors is an integer number (24064950).

Almost surely, 2^1123516620 is an apocalyptic number.

1123516620 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 1123516620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1732676400).

1123516620 is an abundant number, since it is smaller than the sum of its proper divisors (2341836180).

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

1123516620 is a wasteful number, since it uses less digits than its factorization.

1123516620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584 (or 579 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1123516620 is about 33518.8994449400. The cubic root of 1123516620 is about 1039.5845912447.

Adding to 1123516620 its reverse (266153211), we get a palindrome (1389669831).

The spelling of 1123516620 in words is "one billion, one hundred twenty-three million, five hundred sixteen thousand, six hundred twenty".