1220203344 has 40 divisors (see below), whose sum is σ = 3153458880. Its totient is φ = 406571008.

The previous prime is 1220203297. The next prime is 1220203349. The reversal of 1220203344 is 4433020221.

It is a self number, because there is not a number n which added to its sum of digits gives 1220203344.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220203349) 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, 202909 + ... + 208835.

It is an arithmetic number, because the mean of its divisors is an integer number (78836472).

Almost surely, 2^1220203344 is an apocalyptic number.

It is an amenable number.

1220203344 is an abundant number, since it is smaller than the sum of its proper divisors (1933255536).

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

1220203344 is a wasteful number, since it uses less digits than its factorization.

1220203344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10227 (or 10221 counting only the distinct ones).

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

The square root of 1220203344 is about 34931.4091327562. The cubic root of 1220203344 is about 1068.5890927278.

Adding to 1220203344 its reverse (4433020221), we get a palindrome (5653223565).

The spelling of 1220203344 in words is "one billion, two hundred twenty million, two hundred three thousand, three hundred forty-four".