1307313220 has 12 divisors (see below), whose sum is σ = 2745357804. Its totient is φ = 522925280.

The previous prime is 1307313097. The next prime is 1307313233. The reversal of 1307313220 is 223137031.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 817045056 + 490268164 = 28584^2 + 22142^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1307313191 and 1307313200.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32682811 + ... + 32682850.

It is an arithmetic number, because the mean of its divisors is an integer number (228779817).

Almost surely, 2^1307313220 is an apocalyptic number.

1307313220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1307313220 is an abundant number, since it is smaller than the sum of its proper divisors (1438044584).

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

1307313220 is a wasteful number, since it uses less digits than its factorization.

1307313220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65365670 (or 65365668 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 1307313220 is about 36156.7866381956. The cubic root of 1307313220 is about 1093.4356204702.

The spelling of 1307313220 in words is "one billion, three hundred seven million, three hundred thirteen thousand, two hundred twenty".