1223420444 has 6 divisors (see below), whose sum is σ = 2140985784. Its totient is φ = 611710220.

The previous prime is 1223420441. The next prime is 1223420447. The reversal of 1223420444 is 4440243221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1223420441) and next prime (1223420447).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223420441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152927552 + ... + 152927559.

It is an arithmetic number, because the mean of its divisors is an integer number (356830964).

Almost surely, 2^1223420444 is an apocalyptic number.

It is an amenable number.

1223420444 is a deficient number, since it is larger than the sum of its proper divisors (917565340).

1223420444 is a wasteful number, since it uses less digits than its factorization.

1223420444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305855115 (or 305855113 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 1223420444 is about 34977.4276355480. The cubic root of 1223420444 is about 1069.5273902000.

Adding to 1223420444 its reverse (4440243221), we get a palindrome (5663663665).

The spelling of 1223420444 in words is "one billion, two hundred twenty-three million, four hundred twenty thousand, four hundred forty-four".