1220915484 has 24 divisors (see below), whose sum is σ = 3165336720. Its totient is φ = 406971792.

The previous prime is 1220915459. The next prime is 1220915489. The reversal of 1220915484 is 4845190221.

1220915484 is a `hidden beast` number, since 1 + 2 + 20 + 91 + 548 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220915489) by changing a digit.

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, 5652279 + ... + 5652494.

It is an arithmetic number, because the mean of its divisors is an integer number (131889030).

Almost surely, 2^1220915484 is an apocalyptic number.

It is an amenable number.

1220915484 is an abundant number, since it is smaller than the sum of its proper divisors (1944421236).

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

1220915484 is a wasteful number, since it uses less digits than its factorization.

1220915484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11304786 (or 11304778 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 1220915484 is about 34941.6010508963. The cubic root of 1220915484 is about 1068.7969370583.

The spelling of 1220915484 in words is "one billion, two hundred twenty million, nine hundred fifteen thousand, four hundred eighty-four".