304721664 has 144 divisors (see below), whose sum is σ = 912049152. Its totient is φ = 89616384.

The previous prime is 304721653. The next prime is 304721701. The reversal of 304721664 is 466127403.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 228969 + ... + 230295.

Almost surely, 2^304721664 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 304721664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (456024576).

304721664 is an abundant number, since it is smaller than the sum of its proper divisors (607327488).

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

304721664 is a wasteful number, since it uses less digits than its factorization.

304721664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1382 (or 1368 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 304721664 is about 17456.2786412225. The cubic root of 304721664 is about 672.9267259403.

The spelling of 304721664 in words is "three hundred four million, seven hundred twenty-one thousand, six hundred sixty-four".