1220230320 has 80 divisors (see below), whose sum is σ = 3799122912. Its totient is φ = 323983360.

The previous prime is 1220230313. The next prime is 1220230321. The reversal of 1220230320 is 230320221.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1220230320.

It is not an unprimeable number, because it can be changed into a prime (1220230321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45010 + ... + 66830.

Almost surely, 2^1220230320 is an apocalyptic number.

1220230320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220230320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1899561456).

1220230320 is an abundant number, since it is smaller than the sum of its proper divisors (2578892592).

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

1220230320 is a wasteful number, since it uses less digits than its factorization.

1220230320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22070 (or 22064 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 1220230320 is about 34931.7952587610. The cubic root of 1220230320 is about 1068.5969673844.

Adding to 1220230320 its reverse (230320221), we get a palindrome (1450550541).

It can be divided in two parts, 1220 and 230320, that added together give a triangular number (231540 = T₆₈₀).

The spelling of 1220230320 in words is "one billion, two hundred twenty million, two hundred thirty thousand, three hundred twenty".