838428523 has 4 divisors (see below), whose sum is σ = 882556360. Its totient is φ = 794300688.

The previous prime is 838428517. The next prime is 838428529. The reversal of 838428523 is 325824838.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325824838 = 2 ⋅162912419.

It is an interprime number because it is at equal distance from previous prime (838428517) and next prime (838428529).

It is a cyclic number.

It is not a de Polignac number, because 838428523 - 2⁹ = 838428011 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 838428523.

It is not an unprimeable number, because it can be changed into a prime (838428529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22063890 + ... + 22063927.

It is an arithmetic number, because the mean of its divisors is an integer number (220639090).

Almost surely, 2^838428523 is an apocalyptic number.

838428523 is a deficient number, since it is larger than the sum of its proper divisors (44127837).

838428523 is a wasteful number, since it uses less digits than its factorization.

838428523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44127836.

The product of its digits is 368640, while the sum is 43.

The square root of 838428523 is about 28955.6302469831. The cubic root of 838428523 is about 942.9500360933.

The spelling of 838428523 in words is "eight hundred thirty-eight million, four hundred twenty-eight thousand, five hundred twenty-three".