839724485 has 16 divisors (see below), whose sum is σ = 1033975152. Its totient is φ = 654297600.

The previous prime is 839724463. The next prime is 839724491. The reversal of 839724485 is 584427938.

It is a Cunningham number, because it is equal to 28978²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 51294244 + 788430241 = 7162^2 + 28079^2 .

It is not a de Polignac number, because 839724485 - 2²⁴ = 822947269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132407 + ... + 138603.

It is an arithmetic number, because the mean of its divisors is an integer number (64623447).

Almost surely, 2^839724485 is an apocalyptic number.

It is an amenable number.

839724485 is a deficient number, since it is larger than the sum of its proper divisors (194250667).

839724485 is a wasteful number, since it uses less digits than its factorization.

839724485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6904.

The product of its digits is 1935360, while the sum is 50.

The square root of 839724485 is about 28978.0000172545. Note that the first 4 decimals coincide. The cubic root of 839724485 is about 943.4356264132.

The spelling of 839724485 in words is "eight hundred thirty-nine million, seven hundred twenty-four thousand, four hundred eighty-five".