1220020044 has 24 divisors (see below), whose sum is σ = 2853823728. Its totient is φ = 405657600.

The previous prime is 1220020013. The next prime is 1220020093. The reversal of 1220020044 is 4400200221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121957 + ... + 131580.

It is an arithmetic number, because the mean of its divisors is an integer number (118909322).

Almost surely, 2^1220020044 is an apocalyptic number.

It is an amenable number.

1220020044 is an abundant number, since it is smaller than the sum of its proper divisors (1633803684).

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

1220020044 is a wasteful number, since it uses less digits than its factorization.

1220020044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253945 (or 253943 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 1220020044 is about 34928.7853209928. The cubic root of 1220020044 is about 1068.5355819228.

Adding to 1220020044 its reverse (4400200221), we get a palindrome (5620220265).

The spelling of 1220020044 in words is "one billion, two hundred twenty million, twenty thousand, forty-four".