304400400 has 240 divisors, whose sum is σ = 1046183040. Its totient is φ = 75468800.

The previous prime is 304400399. The next prime is 304400429. The reversal of 304400400 is 4004403.

304400400 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 304400400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1131466 + ... + 1131734.

It is an arithmetic number, because the mean of its divisors is an integer number (4359096).

Almost surely, 2^304400400 is an apocalyptic number.

304400400 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 304400400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (523091520).

304400400 is an abundant number, since it is smaller than the sum of its proper divisors (741782640).

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

304400400 is a wasteful number, since it uses less digits than its factorization.

304400400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354 (or 343 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 304400400 is about 17447.0742532953. The cubic root of 304400400 is about 672.6901568827.

Adding to 304400400 its reverse (4004403), we get a palindrome (308404803).

The spelling of 304400400 in words is "three hundred four million, four hundred thousand, four hundred".