303307220 has 24 divisors (see below), whose sum is σ = 640253544. Its totient is φ = 120692736.

The previous prime is 303307211. The next prime is 303307223. The reversal of 303307220 is 22703303.

303307220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 46730896 + 256576324 = 6836^2 + 16018^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 303307192 and 303307201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (303307223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35429 + ... + 43148.

It is an arithmetic number, because the mean of its divisors is an integer number (26677231).

Almost surely, 2^303307220 is an apocalyptic number.

It is an amenable number.

303307220 is an abundant number, since it is smaller than the sum of its proper divisors (336946324).

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

303307220 is a wasteful number, since it uses less digits than its factorization.

303307220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78779 (or 78777 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 20.

The square root of 303307220 is about 17415.7176136960. The cubic root of 303307220 is about 671.8839232851.

The spelling of 303307220 in words is "three hundred three million, three hundred seven thousand, two hundred twenty".