1304501220 has 96 divisors (see below), whose sum is σ = 4427418240. Its totient is φ = 316241280.

The previous prime is 1304501207. The next prime is 1304501251. The reversal of 1304501220 is 221054031.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1304501193 and 1304501202.

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, 103867 + ... + 115746.

It is an arithmetic number, because the mean of its divisors is an integer number (46118940).

Almost surely, 2^1304501220 is an apocalyptic number.

1304501220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1304501220 is an abundant number, since it is smaller than the sum of its proper divisors (3122917020).

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

1304501220 is a wasteful number, since it uses less digits than its factorization.

1304501220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219642 (or 219634 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1304501220 is about 36117.8795058625. The cubic root of 1304501220 is about 1092.6510729159.

Adding to 1304501220 its reverse (221054031), we get a palindrome (1525555251).

The spelling of 1304501220 in words is "one billion, three hundred four million, five hundred one thousand, two hundred twenty".