684825838 has 8 divisors (see below), whose sum is σ = 1028078280. Its totient is φ = 342133080.

The previous prime is 684825809. The next prime is 684825839. The reversal of 684825838 is 838528486.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684825839) 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, 136848 + ... + 141763.

It is an arithmetic number, because the mean of its divisors is an integer number (128509785).

Almost surely, 2^684825838 is an apocalyptic number.

684825838 is a deficient number, since it is larger than the sum of its proper divisors (343252442).

684825838 is a wasteful number, since it uses less digits than its factorization.

684825838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279842.

The product of its digits is 2949120, while the sum is 52.

The square root of 684825838 is about 26169.1772511097. The cubic root of 684825838 is about 881.4412668156.

The spelling of 684825838 in words is "six hundred eighty-four million, eight hundred twenty-five thousand, eight hundred thirty-eight".