389291 has 8 divisors (see below), whose sum is σ = 468480. Its totient is φ = 316008.

The previous prime is 389287. The next prime is 389297. The reversal of 389291 is 192983.

389291 = T₃₃₀ + T₃₃₁ + ... + T₃₃₆.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 389291 - 2² = 389287 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 (389297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1331 + ... + 1596.

It is an arithmetic number, because the mean of its divisors is an integer number (58560).

2³⁸⁹²⁹¹ is an apocalyptic number.

389291 is a deficient number, since it is larger than the sum of its proper divisors (79189).

389291 is a wasteful number, since it uses less digits than its factorization.

389291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2953.

The product of its digits is 3888, while the sum is 32.

The square root of 389291 is about 623.9318873082. The cubic root of 389291 is about 73.0171349031.

The spelling of 389291 in words is "three hundred eighty-nine thousand, two hundred ninety-one".