684685842 has 8 divisors (see below), whose sum is σ = 1369371696. Its totient is φ = 228228612.

The previous prime is 684685823. The next prime is 684685847. The reversal of 684685842 is 248586486.

684685842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

684685842 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (684685847) 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, 57057148 + ... + 57057159.

It is an arithmetic number, because the mean of its divisors is an integer number (171171462).

Almost surely, 2^684685842 is an apocalyptic number.

684685842 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

684685842 is a wasteful number, since it uses less digits than its factorization.

684685842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114114312.

The product of its digits is 2949120, while the sum is 51.

The square root of 684685842 is about 26166.5022882310. The cubic root of 684685842 is about 881.3811996402.

The spelling of 684685842 in words is "six hundred eighty-four million, six hundred eighty-five thousand, eight hundred forty-two".