684352642 has 16 divisors (see below), whose sum is σ = 1051185600. Its totient is φ = 334022832.

The previous prime is 684352639. The next prime is 684352651. The reversal of 684352642 is 246253486.

It is a super-2 number, since 2×684352642² = 936677077224760328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 684352595 and 684352604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4873 + ... + 37315.

It is an arithmetic number, because the mean of its divisors is an integer number (65699100).

Almost surely, 2^684352642 is an apocalyptic number.

684352642 is a deficient number, since it is larger than the sum of its proper divisors (366832958).

684352642 is a wasteful number, since it uses less digits than its factorization.

684352642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32697.

The product of its digits is 276480, while the sum is 40.

The square root of 684352642 is about 26160.1345944550. The cubic root of 684352642 is about 881.2382027360.

The spelling of 684352642 in words is "six hundred eighty-four million, three hundred fifty-two thousand, six hundred forty-two".