380645 has 4 divisors (see below), whose sum is σ = 456780. Its totient is φ = 304512.

The previous prime is 380641. The next prime is 380651. The reversal of 380645 is 546083.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546083 = 37 ⋅14759.

It can be written as a sum of positive squares in 2 ways, for example, as 256036 + 124609 = 506^2 + 353^2 .

It is a cyclic number.

It is not a de Polignac number, because 380645 - 2² = 380641 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380641) 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, 38060 + ... + 38069.

It is an arithmetic number, because the mean of its divisors is an integer number (114195).

2³⁸⁰⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

380645 is a deficient number, since it is larger than the sum of its proper divisors (76135).

380645 is an equidigital number, since it uses as much as digits as its factorization.

380645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76134.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 380645 is about 616.9643425677. The cubic root of 380645 is about 72.4725222863.

The spelling of 380645 in words is "three hundred eighty thousand, six hundred forty-five".