380861 has 4 divisors (see below), whose sum is σ = 410172. Its totient is φ = 351552.

The previous prime is 380843. The next prime is 380867. The reversal of 380861 is 168083.

380861 = T₁₅₈ + T₁₅₉ + ... + T₁₈₃.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 155236 + 225625 = 394^2 + 475^2 .

It is a cyclic number.

It is not a de Polignac number, because 380861 - 2⁶ = 380797 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 380861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14636 + ... + 14661.

It is an arithmetic number, because the mean of its divisors is an integer number (102543).

2³⁸⁰⁸⁶¹ is an apocalyptic number.

It is an amenable number.

380861 is a deficient number, since it is larger than the sum of its proper divisors (29311).

380861 is a wasteful number, since it uses less digits than its factorization.

380861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29310.

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

The square root of 380861 is about 617.1393683764. The cubic root of 380861 is about 72.4862280618.

The spelling of 380861 in words is "three hundred eighty thousand, eight hundred sixty-one".