304222720 has 80 divisors (see below), whose sum is σ = 735185088. Its totient is φ = 120729600.

The previous prime is 304222697. The next prime is 304222727. The reversal of 304222720 is 27222403.

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

It is a junction number, because it is equal to n+sod(n) for n = 304222691 and 304222700.

It is not an unprimeable number, because it can be changed into a prime (304222727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386167 + ... + 386953.

Almost surely, 2^304222720 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 304222720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (367592544).

304222720 is an abundant number, since it is smaller than the sum of its proper divisors (430962368).

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

304222720 is an equidigital number, since it uses as much as digits as its factorization.

304222720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961 (or 945 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 304222720 is about 17441.9815388046. The cubic root of 304222720 is about 672.5592472320.

The spelling of 304222720 in words is "three hundred four million, two hundred twenty-two thousand, seven hundred twenty".