384240728 has 16 divisors (see below), whose sum is σ = 722388480. Its totient is φ = 191603808.

The previous prime is 384240719. The next prime is 384240739. The reversal of 384240728 is 827042483.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 384240691 and 384240700.

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, 61400 + ... + 67367.

It is an arithmetic number, because the mean of its divisors is an integer number (45149280).

Almost surely, 2^384240728 is an apocalyptic number.

It is an amenable number.

384240728 is a deficient number, since it is larger than the sum of its proper divisors (338147752).

384240728 is a wasteful number, since it uses less digits than its factorization.

384240728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129146 (or 129142 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 38.

The square root of 384240728 is about 19602.0592795757. The cubic root of 384240728 is about 727.0000914488. Note that the first 4 decimals are identical.

The spelling of 384240728 in words is "three hundred eighty-four million, two hundred forty thousand, seven hundred twenty-eight".