1223340420 has 24 divisors (see below), whose sum is σ = 3425353344. Its totient is φ = 326224096.

The previous prime is 1223340413. The next prime is 1223340431. The reversal of 1223340420 is 240433221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10194444 + ... + 10194563.

It is an arithmetic number, because the mean of its divisors is an integer number (142723056).

Almost surely, 2^1223340420 is an apocalyptic number.

1223340420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223340420 is an abundant number, since it is smaller than the sum of its proper divisors (2202012924).

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

1223340420 is a wasteful number, since it uses less digits than its factorization.

1223340420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20389019 (or 20389017 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 1223340420 is about 34976.2836790875. The cubic root of 1223340420 is about 1069.5040704093.

Adding to 1223340420 its reverse (240433221), we get a palindrome (1463773641).

The spelling of 1223340420 in words is "one billion, two hundred twenty-three million, three hundred forty thousand, four hundred twenty".