304489440 has 288 divisors, whose sum is σ = 1132185600. Its totient is φ = 74234880.

The previous prime is 304489417. The next prime is 304489441. The reversal of 304489440 is 44984403.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 304489395 and 304489404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304489441) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 847981 + ... + 848339.

It is an arithmetic number, because the mean of its divisors is an integer number (3931200).

Almost surely, 2^304489440 is an apocalyptic number.

304489440 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 304489440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (566092800).

304489440 is an abundant number, since it is smaller than the sum of its proper divisors (827696160).

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

304489440 is a wasteful number, since it uses less digits than its factorization.

304489440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430 (or 419 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 304489440 is about 17449.6257839531. The cubic root of 304489440 is about 672.7557399026.

The spelling of 304489440 in words is "three hundred four million, four hundred eighty-nine thousand, four hundred forty".