1220491326 has 16 divisors (see below), whose sum is σ = 2454470928. Its totient is φ = 404582400.

The previous prime is 1220491301. The next prime is 1220491339. The reversal of 1220491326 is 6231940221.

It is a junction number, because it is equal to n+sod(n) for n = 1220491293 and 1220491302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 560835 + ... + 563006.

It is an arithmetic number, because the mean of its divisors is an integer number (153404433).

Almost surely, 2^1220491326 is an apocalyptic number.

1220491326 is an abundant number, since it is smaller than the sum of its proper divisors (1233979602).

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

1220491326 is a wasteful number, since it uses less digits than its factorization.

1220491326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124027.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 1220491326 is about 34935.5309963939. The cubic root of 1220491326 is about 1068.6731525471.

The spelling of 1220491326 in words is "one billion, two hundred twenty million, four hundred ninety-one thousand, three hundred twenty-six".