838242389 has 4 divisors (see below), whose sum is σ = 841225740. Its totient is φ = 835259040.

The previous prime is 838242371. The next prime is 838242413. The reversal of 838242389 is 983242838.

838242389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 505800100 + 332442289 = 22490^2 + 18233^2 .

It is a cyclic number.

It is not a de Polignac number, because 838242389 - 2²⁴ = 821465173 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 (838242319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1491254 + ... + 1491815.

It is an arithmetic number, because the mean of its divisors is an integer number (210306435).

Almost surely, 2^838242389 is an apocalyptic number.

It is an amenable number.

838242389 is a deficient number, since it is larger than the sum of its proper divisors (2983351).

838242389 is a wasteful number, since it uses less digits than its factorization.

838242389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2983350.

The product of its digits is 663552, while the sum is 47.

The square root of 838242389 is about 28952.4159440970. The cubic root of 838242389 is about 942.8802515511.

The spelling of 838242389 in words is "eight hundred thirty-eight million, two hundred forty-two thousand, three hundred eighty-nine".