684411906 has 8 divisors (see below), whose sum is σ = 1368823824. Its totient is φ = 228137300.

The previous prime is 684411899. The next prime is 684411907. The reversal of 684411906 is 609114486.

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

684411906 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (684411907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57034320 + ... + 57034331.

It is an arithmetic number, because the mean of its divisors is an integer number (171102978).

Almost surely, 2^684411906 is an apocalyptic number.

684411906 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.

684411906 is a wasteful number, since it uses less digits than its factorization.

684411906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114068656.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 684411906 is about 26161.2672858178. The cubic root of 684411906 is about 881.2636400082.

The spelling of 684411906 in words is "six hundred eighty-four million, four hundred eleven thousand, nine hundred six".