1223430400 has 54 divisors (see below), whose sum is σ = 3028197242. Its totient is φ = 489369600.

The previous prime is 1223430379. The next prime is 1223430409. The reversal of 1223430400 is 40343221.

It can be written as a sum of positive squares in 3 ways, for example, as 326308096 + 897122304 = 18064^2 + 29952^2 .

It is not an unprimeable number, because it can be changed into a prime (1223430409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 89181 + ... + 101980.

Almost surely, 2^1223430400 is an apocalyptic number.

1223430400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223430400 is an abundant number, since it is smaller than the sum of its proper divisors (1804766842).

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

1223430400 is an equidigital number, since it uses as much as digits as its factorization.

1223430400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191187 (or 191168 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 1223430400 is about 34977.5699556158. The cubic root of 1223430400 is about 1069.5302914064.

Adding to 1223430400 its reverse (40343221), we get a palindrome (1263773621).

It can be divided in two parts, 1223430 and 400, that added together give a triangular number (1223830 = T₁₅₆₄).

The spelling of 1223430400 in words is "one billion, two hundred twenty-three million, four hundred thirty thousand, four hundred".