389825138 has 4 divisors (see below), whose sum is σ = 584737710. Its totient is φ = 194912568.

The previous prime is 389825119. The next prime is 389825153. The reversal of 389825138 is 831528983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 831528983 = 613 ⋅1356491.

It can be written as a sum of positive squares in only one way, i.e., 251127409 + 138697729 = 15847^2 + 11777^2 .

It is a junction number, because it is equal to n+sod(n) for n = 389825092 and 389825101.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97456283 + ... + 97456286.

Almost surely, 2^389825138 is an apocalyptic number.

389825138 is a deficient number, since it is larger than the sum of its proper divisors (194912572).

389825138 is a wasteful number, since it uses less digits than its factorization.

389825138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194912571.

The product of its digits is 414720, while the sum is 47.

The square root of 389825138 is about 19743.9899209861. The cubic root of 389825138 is about 730.5051473325.

The spelling of 389825138 in words is "three hundred eighty-nine million, eight hundred twenty-five thousand, one hundred thirty-eight".