684830196 has 18 divisors (see below), whose sum is σ = 1731098642. Its totient is φ = 228276720.

The previous prime is 684830191. The next prime is 684830203. The reversal of 684830196 is 691038486.

It can be written as a sum of positive squares in only one way, i.e., 408605796 + 276224400 = 20214^2 + 16620^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684830191) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9511495 + ... + 9511566.

Almost surely, 2^684830196 is an apocalyptic number.

It is an amenable number.

684830196 is an abundant number, since it is smaller than the sum of its proper divisors (1046268446).

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

684830196 is a wasteful number, since it uses less digits than its factorization.

684830196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19023071 (or 19023066 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 684830196 is about 26169.2605168736. The cubic root of 684830196 is about 881.4431365430.

The spelling of 684830196 in words is "six hundred eighty-four million, eight hundred thirty thousand, one hundred ninety-six".