303305040 has 80 divisors (see below), whose sum is σ = 1044724800. Its totient is φ = 80880768.

The previous prime is 303305039. The next prime is 303305069. The reversal of 303305040 is 40503303.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68050 + ... + 72369.

It is an arithmetic number, because the mean of its divisors is an integer number (13059060).

Almost surely, 2^303305040 is an apocalyptic number.

303305040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

303305040 is an abundant number, since it is smaller than the sum of its proper divisors (741419760).

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

303305040 is a wasteful number, since it uses less digits than its factorization.

303305040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140441 (or 140429 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 18.

The square root of 303305040 is about 17415.6550264410. The cubic root of 303305040 is about 671.8823135746.

Adding to 303305040 its reverse (40503303), we get a palindrome (343808343).

The spelling of 303305040 in words is "three hundred three million, three hundred five thousand, forty".