381860 has 24 divisors (see below), whose sum is σ = 817656. Its totient is φ = 149760.

The previous prime is 381859. The next prime is 381911. The reversal of 381860 is 68183.

381860 = T₈₀ + T₈₁ + ... + T₁₄₀.

It can be written as a sum of positive squares in 4 ways, for example, as 40804 + 341056 = 202^2 + 584^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1064 + ... + 1376.

It is an arithmetic number, because the mean of its divisors is an integer number (34069).

2³⁸¹⁸⁶⁰ is an apocalyptic number.

It is an amenable number.

381860 is an abundant number, since it is smaller than the sum of its proper divisors (435796).

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

381860 is a wasteful number, since it uses less digits than its factorization.

381860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383 (or 381 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 381860 is about 617.9482178953. The cubic root of 381860 is about 72.5495499563.

The spelling of 381860 in words is "three hundred eighty-one thousand, eight hundred sixty".