684963380 has 24 divisors (see below), whose sum is σ = 1458130632. Its totient is φ = 270231552.

The previous prime is 684963353. The next prime is 684963397. The reversal of 684963380 is 83369486.

684963380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 154306084 + 530657296 = 12422^2 + 23036^2 .

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233117 + ... + 236036.

It is an arithmetic number, because the mean of its divisors is an integer number (60755443).

Almost surely, 2^684963380 is an apocalyptic number.

It is an amenable number.

684963380 is an abundant number, since it is smaller than the sum of its proper divisors (773167252).

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

684963380 is a wasteful number, since it uses less digits than its factorization.

684963380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469235 (or 469233 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 47.

The square root of 684963380 is about 26171.8050581155. The cubic root of 684963380 is about 881.5002730975.

The spelling of 684963380 in words is "six hundred eighty-four million, nine hundred sixty-three thousand, three hundred eighty".