384523812 has 18 divisors (see below), whose sum is σ = 971990838. Its totient is φ = 128174592.

The previous prime is 384523801. The next prime is 384523819. The reversal of 384523812 is 218325483.

It can be written as a sum of positive squares in only one way, i.e., 377680356 + 6843456 = 19434^2 + 2616^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×384523812² = 295717123990022688, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 10681217 = 384523812 / (3 + 8 + 4 + 5 + 2 + 3 + 8 + 1 + 2).

It is not an unprimeable number, because it can be changed into a prime (384523819) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5340573 + ... + 5340644.

It is an arithmetic number, because the mean of its divisors is an integer number (53999491).

Almost surely, 2^384523812 is an apocalyptic number.

It is an amenable number.

384523812 is an abundant number, since it is smaller than the sum of its proper divisors (587467026).

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

384523812 is a wasteful number, since it uses less digits than its factorization.

384523812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10681227 (or 10681222 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 384523812 is about 19609.2787220744. The cubic root of 384523812 is about 727.1785833498.

The spelling of 384523812 in words is "three hundred eighty-four million, five hundred twenty-three thousand, eight hundred twelve".