1230400420 has 24 divisors (see below), whose sum is σ = 2584782144. Its totient is φ = 491980896.

The previous prime is 1230400403. The next prime is 1230400421. The reversal of 1230400420 is 240040321.

It is a junction number, because it is equal to n+sod(n) for n = 1230400394 and 1230400403.

It is not an unprimeable number, because it can be changed into a prime (1230400421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54457 + ... + 73663.

It is an arithmetic number, because the mean of its divisors is an integer number (107699256).

Almost surely, 2^1230400420 is an apocalyptic number.

1230400420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1230400420 is an abundant number, since it is smaller than the sum of its proper divisors (1354381724).

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

1230400420 is a wasteful number, since it uses less digits than its factorization.

1230400420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22419 (or 22417 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1230400420 is about 35077.0640162486. The cubic root of 1230400420 is about 1071.5575244241.

Adding to 1230400420 its reverse (240040321), we get a palindrome (1470440741).

The spelling of 1230400420 in words is "one billion, two hundred thirty million, four hundred thousand, four hundred twenty".