381880 has 16 divisors (see below), whose sum is σ = 859320. Its totient is φ = 152736.

The previous prime is 381859. The next prime is 381911. The reversal of 381880 is 88183.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4734 + ... + 4813.

2³⁸¹⁸⁸⁰ is an apocalyptic number.

It is an amenable number.

381880 is an abundant number, since it is smaller than the sum of its proper divisors (477440).

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

381880 is a wasteful number, since it uses less digits than its factorization.

381880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9558 (or 9554 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 381880 is about 617.9644002691. The cubic root of 381880 is about 72.5508165336.

The spelling of 381880 in words is "three hundred eighty-one thousand, eight hundred eighty".