1123456620 has 192 divisors, whose sum is σ = 3856978944. Its totient is φ = 240430080.

The previous prime is 1123456601. The next prime is 1123456627. The reversal of 1123456620 is 266543211.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1123456627) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 194494 + ... + 200186.

It is an arithmetic number, because the mean of its divisors is an integer number (20088432).

Almost surely, 2^1123456620 is an apocalyptic number.

1123456620 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 1123456620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1928489472).

1123456620 is an abundant number, since it is smaller than the sum of its proper divisors (2733522324).

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

1123456620 is a wasteful number, since it uses less digits than its factorization.

1123456620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5752 (or 5750 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 1123456620 is about 33518.0044155376. The cubic root of 1123456620 is about 1039.5660850102.

Adding to 1123456620 its reverse (266543211), we get a palindrome (1389999831).

The spelling of 1123456620 in words is "one billion, one hundred twenty-three million, four hundred fifty-six thousand, six hundred twenty".