825839685 has 64 divisors (see below), whose sum is σ = 1695893760. Its totient is φ = 376842240.

The previous prime is 825839681. The next prime is 825839701. The reversal of 825839685 is 586938528.

It is not a de Polignac number, because 825839685 - 2² = 825839681 is a prime.

It is a super-2 number, since 2×825839685² = 1364022370641798450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825839681) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8889 + ... + 41601.

It is an arithmetic number, because the mean of its divisors is an integer number (26498340).

Almost surely, 2^825839685 is an apocalyptic number.

825839685 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

825839685 is an abundant number, since it is smaller than the sum of its proper divisors (870054075).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

825839685 is a wasteful number, since it uses less digits than its factorization.

825839685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32755 (or 32749 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 54.

The square root of 825839685 is about 28737.4265549301. The cubic root of 825839685 is about 938.2068141740.

The spelling of 825839685 in words is "eight hundred twenty-five million, eight hundred thirty-nine thousand, six hundred eighty-five".