1688830046 has 4 divisors (see below), whose sum is σ = 2533245072. Its totient is φ = 844415022.

The previous prime is 1688830021. The next prime is 1688830061. The reversal of 1688830046 is 6400388861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6400388861 = 8863 ⋅722147.

It is a junction number, because it is equal to n+sod(n) for n = 1688829979 and 1688830006.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 422207510 + ... + 422207513.

It is an arithmetic number, because the mean of its divisors is an integer number (633311268).

Almost surely, 2^1688830046 is an apocalyptic number.

1688830046 is a deficient number, since it is larger than the sum of its proper divisors (844415026).

1688830046 is an equidigital number, since it uses as much as digits as its factorization.

1688830046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844415025.

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 1688830046 is about 41095.3774286111. The cubic root of 1688830046 is about 1190.8634944527.

The spelling of 1688830046 in words is "one billion, six hundred eighty-eight million, eight hundred thirty thousand, forty-six".