384643990 has 8 divisors (see below), whose sum is σ = 692359200. Its totient is φ = 153857592.

The previous prime is 384643957. The next prime is 384643993. The reversal of 384643990 is 99346483.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 384643990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384643993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19232190 + ... + 19232209.

It is an arithmetic number, because the mean of its divisors is an integer number (86544900).

Almost surely, 2^384643990 is an apocalyptic number.

384643990 is a deficient number, since it is larger than the sum of its proper divisors (307715210).

384643990 is a wasteful number, since it uses less digits than its factorization.

384643990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38464406.

The product of its (nonzero) digits is 559872, while the sum is 46.

The square root of 384643990 is about 19612.3427973305. The cubic root of 384643990 is about 727.2543322478.

The spelling of 384643990 in words is "three hundred eighty-four million, six hundred forty-three thousand, nine hundred ninety".