303216240 has 80 divisors (see below), whose sum is σ = 942573600. Its totient is φ = 80633856.

The previous prime is 303216217. The next prime is 303216247. The reversal of 303216240 is 42612303.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (303216247) 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, 96616 + ... + 99704.

It is an arithmetic number, because the mean of its divisors is an integer number (11782170).

Almost surely, 2^303216240 is an apocalyptic number.

303216240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 303216240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (471286800).

303216240 is an abundant number, since it is smaller than the sum of its proper divisors (639357360).

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

303216240 is a wasteful number, since it uses less digits than its factorization.

303216240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3514 (or 3508 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 303216240 is about 17413.1054094323. The cubic root of 303216240 is about 671.8167371580.

Adding to 303216240 its reverse (42612303), we get a palindrome (345828543).

The spelling of 303216240 in words is "three hundred three million, two hundred sixteen thousand, two hundred forty".