1220975280 has 120 divisors (see below), whose sum is σ = 4686238752. Its totient is φ = 279078912.

The previous prime is 1220975251. The next prime is 1220975293. The reversal of 1220975280 is 825790221.

1220975280 is a `hidden beast` number, since 122 + 0 + 9 + 7 + 528 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

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

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 23 ways as a sum of consecutive naturals, for example, 116089 + ... + 126168.

Almost surely, 2^1220975280 is an apocalyptic number.

1220975280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220975280 is an abundant number, since it is smaller than the sum of its proper divisors (3465263472).

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

1220975280 is a wasteful number, since it uses less digits than its factorization.

1220975280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242283 (or 242274 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 1220975280 is about 34942.4566966892. The cubic root of 1220975280 is about 1068.8143853691.

The spelling of 1220975280 in words is "one billion, two hundred twenty million, nine hundred seventy-five thousand, two hundred eighty".