303820340 has 48 divisors (see below), whose sum is σ = 667699200. Its totient is φ = 115906560.

The previous prime is 303820339. The next prime is 303820343. The reversal of 303820340 is 43028303.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (303820343) 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, 205805 + ... + 207275.

It is an arithmetic number, because the mean of its divisors is an integer number (13910400).

Almost surely, 2^303820340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 303820340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (333849600).

303820340 is an abundant number, since it is smaller than the sum of its proper divisors (363878860).

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

303820340 is a wasteful number, since it uses less digits than its factorization.

303820340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1952 (or 1950 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 303820340 is about 17430.4429088879. The cubic root of 303820340 is about 672.2625963755.

Adding to 303820340 its reverse (43028303), we get a palindrome (346848643).

The spelling of 303820340 in words is "three hundred three million, eight hundred twenty thousand, three hundred forty".