1236320420 has 12 divisors (see below), whose sum is σ = 2596272924. Its totient is φ = 494528160.

The previous prime is 1236320419. The next prime is 1236320429. The reversal of 1236320420 is 240236321.

It can be written as a sum of positive squares in 2 ways, for example, as 583415716 + 652904704 = 24154^2 + 25552^2 .

It is not an unprimeable number, because it can be changed into a prime (1236320429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30907991 + ... + 30908030.

It is an arithmetic number, because the mean of its divisors is an integer number (216356077).

Almost surely, 2^1236320420 is an apocalyptic number.

1236320420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1236320420 is an abundant number, since it is smaller than the sum of its proper divisors (1359952504).

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

1236320420 is a wasteful number, since it uses less digits than its factorization.

1236320420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61816030 (or 61816028 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1236320420 is about 35161.3483814259. The cubic root of 1236320420 is about 1073.2733543721.

Adding to 1236320420 its reverse (240236321), we get a palindrome (1476556741).

The spelling of 1236320420 in words is "one billion, two hundred thirty-six million, three hundred twenty thousand, four hundred twenty".