1123520580 has 288 divisors, whose sum is σ = 4238567424. Its totient is φ = 234565632.

The previous prime is 1123520579. The next prime is 1123520609. The reversal of 1123520580 is 850253211.

It is a happy number.

1123520580 is a `hidden beast` number, since 11 + 23 + 52 + 0 + 580 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1850637 + ... + 1851243.

It is an arithmetic number, because the mean of its divisors is an integer number (14717248).

Almost surely, 2^1123520580 is an apocalyptic number.

1123520580 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 1123520580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2119283712).

1123520580 is an abundant number, since it is smaller than the sum of its proper divisors (3115046844).

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

1123520580 is a wasteful number, since it uses less digits than its factorization.

1123520580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755 (or 750 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 1123520580 is about 33518.9585160398. The cubic root of 1123520580 is about 1039.5858126329.

Adding to 1123520580 its reverse (850253211), we get a palindrome (1973773791).

The spelling of 1123520580 in words is "one billion, one hundred twenty-three million, five hundred twenty thousand, five hundred eighty".