380639 has 4 divisors (see below), whose sum is σ = 435024. Its totient is φ = 326256.

The previous prime is 380629. The next prime is 380641. The reversal of 380639 is 936083.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 936083 = 503 ⋅1861.

It is not a de Polignac number, because 380639 - 2⁴ = 380623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380629) 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, 27182 + ... + 27195.

It is an arithmetic number, because the mean of its divisors is an integer number (108756).

2³⁸⁰⁶³⁹ is an apocalyptic number.

380639 is a deficient number, since it is larger than the sum of its proper divisors (54385).

380639 is an equidigital number, since it uses as much as digits as its factorization.

380639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54384.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 380639 is about 616.9594800309. The cubic root of 380639 is about 72.4721414964.

The spelling of 380639 in words is "three hundred eighty thousand, six hundred thirty-nine".