1220240544 has 48 divisors (see below), whose sum is σ = 3205244448. Its totient is φ = 406478592.

The previous prime is 1220240531. The next prime is 1220240561. The reversal of 1220240544 is 4450420221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187554 + ... + 193950.

It is an arithmetic number, because the mean of its divisors is an integer number (66775926).

Almost surely, 2^1220240544 is an apocalyptic number.

It is an amenable number.

1220240544 is an abundant number, since it is smaller than the sum of its proper divisors (1985003904).

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

1220240544 is a wasteful number, since it uses less digits than its factorization.

1220240544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8397 (or 8389 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 1220240544 is about 34931.9416007756. The cubic root of 1220240544 is about 1068.5999518769.

Adding to 1220240544 its reverse (4450420221), we get a palindrome (5670660765).

The spelling of 1220240544 in words is "one billion, two hundred twenty million, two hundred forty thousand, five hundred forty-four".