304678388 has 12 divisors (see below), whose sum is σ = 609356832. Its totient is φ = 130576440.

The previous prime is 304678351. The next prime is 304678391. The reversal of 304678388 is 883876403.

304678388 is an admirable number.

It is a super-2 number, since 2×304678388² = 185657840228557088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5440658 + ... + 5440713.

It is an arithmetic number, because the mean of its divisors is an integer number (50779736).

Almost surely, 2^304678388 is an apocalyptic number.

It is an amenable number.

304678388 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

304678388 is a wasteful number, since it uses less digits than its factorization.

304678388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10881382 (or 10881380 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 47.

The square root of 304678388 is about 17455.0390432104. The cubic root of 304678388 is about 672.8948685010.

The spelling of 304678388 in words is "three hundred four million, six hundred seventy-eight thousand, three hundred eighty-eight".