842816439 has 24 divisors (see below), whose sum is σ = 1278176640. Its totient is φ = 534129552.

The previous prime is 842816431. The next prime is 842816453. The reversal of 842816439 is 934618248.

It is a happy number.

It is not a de Polignac number, because 842816439 - 2³ = 842816431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 842816394 and 842816403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842816431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21252 + ... + 46230.

It is an arithmetic number, because the mean of its divisors is an integer number (53257360).

Almost surely, 2^842816439 is an apocalyptic number.

842816439 is a deficient number, since it is larger than the sum of its proper divisors (435360201).

842816439 is a wasteful number, since it uses less digits than its factorization.

842816439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25171 (or 25168 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 842816439 is about 29031.3010214837. The cubic root of 842816439 is about 944.5921512060.

It can be divided in two parts, 842 and 816439, that added together give a triangular number (817281 = T₁₂₇₈).

The spelling of 842816439 in words is "eight hundred forty-two million, eight hundred sixteen thousand, four hundred thirty-nine".