1220320430 has 64 divisors (see below), whose sum is σ = 2637619200. Its totient is φ = 397440384.

The previous prime is 1220320427. The next prime is 1220320441. The reversal of 1220320430 is 340230221.

It is a junction number, because it is equal to n+sod(n) for n = 1220320399 and 1220320408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 237347 + ... + 242433.

It is an arithmetic number, because the mean of its divisors is an integer number (41212800).

Almost surely, 2^1220320430 is an apocalyptic number.

1220320430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220320430 is an abundant number, since it is smaller than the sum of its proper divisors (1417298770).

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

1220320430 is a wasteful number, since it uses less digits than its factorization.

1220320430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5273.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 1220320430 is about 34933.0850341048. The cubic root of 1220320430 is about 1068.6232708620.

Adding to 1220320430 its reverse (340230221), we get a palindrome (1560550651).

The spelling of 1220320430 in words is "one billion, two hundred twenty million, three hundred twenty thousand, four hundred thirty".