1230440420 has 48 divisors (see below), whose sum is σ = 2916043200. Its totient is φ = 432001920.

The previous prime is 1230440411. The next prime is 1230440459. The reversal of 1230440420 is 240440321.

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 = 1230440392 and 1230440401.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90050 + ... + 102809.

It is an arithmetic number, because the mean of its divisors is an integer number (60750900).

Almost surely, 2^1230440420 is an apocalyptic number.

1230440420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1230440420 is an abundant number, since it is smaller than the sum of its proper divisors (1685602780).

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

1230440420 is a wasteful number, since it uses less digits than its factorization.

1230440420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192908 (or 192906 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 1230440420 is about 35077.6341847622. The cubic root of 1230440420 is about 1071.5691363177.

Adding to 1230440420 its reverse (240440321), we get a palindrome (1470880741).

Subtracting from 1230440420 its reverse (240440321), we obtain a palindrome (990000099).

The spelling of 1230440420 in words is "one billion, two hundred thirty million, four hundred forty thousand, four hundred twenty".