381331984 has 60 divisors (see below), whose sum is σ = 825671980. Its totient is φ = 170438400.

The previous prime is 381331967. The next prime is 381331997. The reversal of 381331984 is 489133183.

It can be written as a sum of positive squares in 2 ways, for example, as 52707600 + 328624384 = 7260^2 + 18128^2 .

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 11 ways as a sum of consecutive naturals, for example, 116482 + ... + 119710.

Almost surely, 2^381331984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 381331984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (412835990).

381331984 is an abundant number, since it is smaller than the sum of its proper divisors (444339996).

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

381331984 is a wasteful number, since it uses less digits than its factorization.

381331984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3320 (or 3303 counting only the distinct ones).

The product of its digits is 62208, while the sum is 40.

The square root of 381331984 is about 19527.7234720282. The cubic root of 381331984 is about 725.1609529294.

The spelling of 381331984 in words is "three hundred eighty-one million, three hundred thirty-one thousand, nine hundred eighty-four".