684834380 has 24 divisors (see below), whose sum is σ = 1438674048. Its totient is φ = 273834368.

The previous prime is 684834349. The next prime is 684834427. The reversal of 684834380 is 83438486.

684834380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 78392 + ... + 86688.

It is an arithmetic number, because the mean of its divisors is an integer number (59944752).

Almost surely, 2^684834380 is an apocalyptic number.

It is an amenable number.

684834380 is an abundant number, since it is smaller than the sum of its proper divisors (753839668).

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

684834380 is a wasteful number, since it uses less digits than its factorization.

684834380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12433 (or 12431 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 44.

The square root of 684834380 is about 26169.3404578717. The cubic root of 684834380 is about 881.4449316111. Note that the first 3 decimals are identical.

The spelling of 684834380 in words is "six hundred eighty-four million, eight hundred thirty-four thousand, three hundred eighty".