389215 has 16 divisors (see below), whose sum is σ = 522720. Its totient is φ = 276480.

The previous prime is 389189. The next prime is 389219. The reversal of 389215 is 512983.

389215 = T₅₀ + T₅₁ + ... + T₁₃₄.

389215 = 277² + 278² + ... + 281².

It is not a de Polignac number, because 389215 - 2¹⁷ = 258143 is a prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1495 + ... + 1735.

It is an arithmetic number, because the mean of its divisors is an integer number (32670).

389215 is a Friedman number, since it can be written as 95*((8*2)^3+1), using all its digits and the basic arithmetic operations.

2³⁸⁹²¹⁵ is an apocalyptic number.

389215 is a deficient number, since it is larger than the sum of its proper divisors (133505).

389215 is a wasteful number, since it uses less digits than its factorization.

389215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282.

The product of its digits is 2160, while the sum is 28.

The square root of 389215 is about 623.8709802515. The cubic root of 389215 is about 73.0123829622.

The spelling of 389215 in words is "three hundred eighty-nine thousand, two hundred fifteen".