1220449944 has 32 divisors (see below), whose sum is σ = 3487000320. Its totient is φ = 348699936.

The previous prime is 1220449939. The next prime is 1220449981. The reversal of 1220449944 is 4499440221.

It is a congruent number.

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, 3632124 + ... + 3632459.

It is an arithmetic number, because the mean of its divisors is an integer number (108968760).

Almost surely, 2^1220449944 is an apocalyptic number.

1220449944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1220449944 is an abundant number, since it is smaller than the sum of its proper divisors (2266550376).

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

1220449944 is a wasteful number, since it uses less digits than its factorization.

1220449944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7264599 (or 7264595 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 1220449944 is about 34934.9387290145. The cubic root of 1220449944 is about 1068.6610742604.

The spelling of 1220449944 in words is "one billion, two hundred twenty million, four hundred forty-nine thousand, nine hundred forty-four".