684370340 has 12 divisors (see below), whose sum is σ = 1437177756. Its totient is φ = 273748128.

The previous prime is 684370301. The next prime is 684370363. The reversal of 684370340 is 43073486.

It can be written as a sum of positive squares in 2 ways, for example, as 204146944 + 480223396 = 14288^2 + 21914^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 684370340.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 17109239 + ... + 17109278.

It is an arithmetic number, because the mean of its divisors is an integer number (119764813).

Almost surely, 2^684370340 is an apocalyptic number.

It is an amenable number.

684370340 is an abundant number, since it is smaller than the sum of its proper divisors (752807416).

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

684370340 is a wasteful number, since it uses less digits than its factorization.

684370340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34218526 (or 34218524 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 684370340 is about 26160.4728550537. The cubic root of 684370340 is about 881.2457992188.

The spelling of 684370340 in words is "six hundred eighty-four million, three hundred seventy thousand, three hundred forty".