1220608072 has 8 divisors (see below), whose sum is σ = 2288640150. Its totient is φ = 610304032.

The previous prime is 1220608069. The next prime is 1220608087. The reversal of 1220608072 is 2708060221.

It can be written as a sum of positive squares in only one way, i.e., 748241316 + 472366756 = 27354^2 + 21734^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1220608072.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76287997 + ... + 76288012.

Almost surely, 2^1220608072 is an apocalyptic number.

It is an amenable number.

1220608072 is a deficient number, since it is larger than the sum of its proper divisors (1068032078).

1220608072 is a wasteful number, since it uses less digits than its factorization.

1220608072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152576015 (or 152576011 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1220608072 is about 34937.2018341481. The cubic root of 1220608072 is about 1068.7072260756.

Adding to 1220608072 its reverse (2708060221), we get a palindrome (3928668293).

The spelling of 1220608072 in words is "one billion, two hundred twenty million, six hundred eight thousand, seventy-two".