1220441544 has 48 divisors (see below), whose sum is σ = 3777558720. Its totient is φ = 348697440.

The previous prime is 1220441501. The next prime is 1220441549. The reversal of 1220441544 is 4451440221.

1220441544 is a `hidden beast` number, since 1 + 2 + 204 + 415 + 44 = 666.

1220441544 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1220441544² = 2978955124642207872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1220441549) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1210252 + ... + 1211259.

It is an arithmetic number, because the mean of its divisors is an integer number (78699140).

Almost surely, 2^1220441544 is an apocalyptic number.

1220441544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1220441544 is an abundant number, since it is smaller than the sum of its proper divisors (2557117176).

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

1220441544 is a wasteful number, since it uses less digits than its factorization.

1220441544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2421530 (or 2421523 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 1220441544 is about 34934.8185053250. The cubic root of 1220441544 is about 1068.6586224943.

Adding to 1220441544 its reverse (4451440221), we get a palindrome (5671881765).

The spelling of 1220441544 in words is "one billion, two hundred twenty million, four hundred forty-one thousand, five hundred forty-four".