384809818 has 4 divisors (see below), whose sum is σ = 577214730. Its totient is φ = 192404908.

The previous prime is 384809813. The next prime is 384809819. The reversal of 384809818 is 818908483.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 224610169 + 160199649 = 14987^2 + 12657^2 .

It is not an unprimeable number, because it can be changed into a prime (384809813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96202453 + ... + 96202456.

Almost surely, 2^384809818 is an apocalyptic number.

384809818 is a deficient number, since it is larger than the sum of its proper divisors (192404912).

384809818 is a wasteful number, since it uses less digits than its factorization.

384809818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192404911.

The product of its (nonzero) digits is 442368, while the sum is 49.

The square root of 384809818 is about 19616.5699856015. The cubic root of 384809818 is about 727.3588287067.

The spelling of 384809818 in words is "three hundred eighty-four million, eight hundred nine thousand, eight hundred eighteen".