1123232420 has 24 divisors (see below), whose sum is σ = 2368921464. Its totient is φ = 447362816.

The previous prime is 1123232417. The next prime is 1123232441. The reversal of 1123232420 is 242323211.

It can be written as a sum of positive squares in 4 ways, for example, as 24840256 + 1098392164 = 4984^2 + 33142^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1123232392 and 1123232401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115859 + ... + 125178.

It is an arithmetic number, because the mean of its divisors is an integer number (98705061).

Almost surely, 2^1123232420 is an apocalyptic number.

1123232420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123232420 is an abundant number, since it is smaller than the sum of its proper divisors (1245689044).

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

1123232420 is a wasteful number, since it uses less digits than its factorization.

1123232420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241279 (or 241277 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1123232420 is about 33514.6597774765. The cubic root of 1123232420 is about 1039.4969275493.

Adding to 1123232420 its reverse (242323211), we get a palindrome (1365555631).

The spelling of 1123232420 in words is "one billion, one hundred twenty-three million, two hundred thirty-two thousand, four hundred twenty".