389842 has 8 divisors (see below), whose sum is σ = 615600. Its totient is φ = 184644.

The previous prime is 389839. The next prime is 389849. The reversal of 389842 is 248983.

389842 = T₁₉₃ + T₁₉₄ + ... + T₂₁₁.

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

It is a nialpdrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 389798 and 389807.

It is not an unprimeable number, because it can be changed into a prime (389849) 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 3 ways as a sum of consecutive naturals, for example, 5092 + ... + 5167.

It is an arithmetic number, because the mean of its divisors is an integer number (76950).

2³⁸⁹⁸⁴² is an apocalyptic number.

389842 is a deficient number, since it is larger than the sum of its proper divisors (225758).

389842 is a wasteful number, since it uses less digits than its factorization.

389842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10280.

The product of its digits is 13824, while the sum is 34.

The square root of 389842 is about 624.3732857834. The cubic root of 389842 is about 73.0515679918.

The spelling of 389842 in words is "three hundred eighty-nine thousand, eight hundred forty-two".