1220320839 has 8 divisors (see below), whose sum is σ = 1627356400. Its totient is φ = 813416256.

The previous prime is 1220320837. The next prime is 1220320861. The reversal of 1220320839 is 9380230221.

It is a happy number.

1220320839 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1220320839 - 2¹ = 1220320837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220320837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8422 + ... + 50115.

It is an arithmetic number, because the mean of its divisors is an integer number (203419550).

Almost surely, 2^1220320839 is an apocalyptic number.

1220320839 is a deficient number, since it is larger than the sum of its proper divisors (407035561).

1220320839 is an equidigital number, since it uses as much as digits as its factorization.

1220320839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65489.

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

The square root of 1220320839 is about 34933.0908881536. The cubic root of 1220320839 is about 1068.6233902478.

The spelling of 1220320839 in words is "one billion, two hundred twenty million, three hundred twenty thousand, eight hundred thirty-nine".