684469788 has 24 divisors (see below), whose sum is σ = 1666535808. Its totient is φ = 218236656.

The previous prime is 684469787. The next prime is 684469823. The reversal of 684469788 is 887964486.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684469787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1239706 + ... + 1240257.

It is an arithmetic number, because the mean of its divisors is an integer number (69438992).

Almost surely, 2^684469788 is an apocalyptic number.

It is an amenable number.

684469788 is an abundant number, since it is smaller than the sum of its proper divisors (982066020).

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

684469788 is a wasteful number, since it uses less digits than its factorization.

684469788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2479993 (or 2479991 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 60.

The square root of 684469788 is about 26162.3735161778. The cubic root of 684469788 is about 881.2884826815.

The spelling of 684469788 in words is "six hundred eighty-four million, four hundred sixty-nine thousand, seven hundred eighty-eight".