303840640 has 32 divisors (see below), whose sum is σ = 726370560. Its totient is φ = 121536000.

The previous prime is 303840637. The next prime is 303840659. The reversal of 303840640 is 46048303.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 303840599 and 303840608.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 236736 + ... + 238015.

It is an arithmetic number, because the mean of its divisors is an integer number (22699080).

Almost surely, 2^303840640 is an apocalyptic number.

It is an amenable number.

303840640 is an abundant number, since it is smaller than the sum of its proper divisors (422529920).

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

303840640 is an equidigital number, since it uses as much as digits as its factorization.

303840640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474770 (or 474758 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 303840640 is about 17431.0252136815. The cubic root of 303840640 is about 672.2775686304.

Adding to 303840640 its reverse (46048303), we get a palindrome (349888943).

The spelling of 303840640 in words is "three hundred three million, eight hundred forty thousand, six hundred forty".