303409940 has 12 divisors (see below), whose sum is σ = 637160916. Its totient is φ = 121363968.

The previous prime is 303409937. The next prime is 303409961. The reversal of 303409940 is 49904303.

303409940 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 168013444 + 135396496 = 12962^2 + 11636^2 .

303409940 is strictly pandigital in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 303409897 and 303409906.

It is a congruent number.

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, 7585229 + ... + 7585268.

It is an arithmetic number, because the mean of its divisors is an integer number (53096743).

Almost surely, 2^303409940 is an apocalyptic number.

It is an amenable number.

303409940 is an abundant number, since it is smaller than the sum of its proper divisors (333750976).

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

303409940 is a wasteful number, since it uses less digits than its factorization.

303409940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15170506 (or 15170504 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 303409940 is about 17418.6664242703. Note that the first 3 decimals coincide. The cubic root of 303409940 is about 671.9597629205.

The spelling of 303409940 in words is "three hundred three million, four hundred nine thousand, nine hundred forty".