389892842 has 4 divisors (see below), whose sum is σ = 584839266. Its totient is φ = 194946420.

The previous prime is 389892829. The next prime is 389892847. The reversal of 389892842 is 248298983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 248298983 = 541 ⋅458963.

It can be written as a sum of positive squares in only one way, i.e., 389707081 + 185761 = 19741^2 + 431^2 .

It is not an unprimeable number, because it can be changed into a prime (389892847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97473209 + ... + 97473212.

Almost surely, 2^389892842 is an apocalyptic number.

389892842 is a deficient number, since it is larger than the sum of its proper divisors (194946424).

389892842 is a wasteful number, since it uses less digits than its factorization.

389892842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194946423.

The product of its digits is 1990656, while the sum is 53.

The square root of 389892842 is about 19745.7043936143. The cubic root of 389892842 is about 730.5474357439.

The spelling of 389892842 in words is "three hundred eighty-nine million, eight hundred ninety-two thousand, eight hundred forty-two".