381820384 has 48 divisors (see below), whose sum is σ = 821678256. Its totient is φ = 173209600.

The previous prime is 381820343. The next prime is 381820399. The reversal of 381820384 is 483028183.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279864 + ... + 281224.

It is an arithmetic number, because the mean of its divisors is an integer number (17118297).

Almost surely, 2^381820384 is an apocalyptic number.

It is an amenable number.

381820384 is an abundant number, since it is smaller than the sum of its proper divisors (439857872).

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

381820384 is a wasteful number, since it uses less digits than its factorization.

381820384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2179 (or 2171 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 381820384 is about 19540.2247684104. The cubic root of 381820384 is about 725.4704098930.

The spelling of 381820384 in words is "three hundred eighty-one million, eight hundred twenty thousand, three hundred eighty-four".