1688988466 has 16 divisors (see below), whose sum is σ = 2764430208. Its totient is φ = 767546800.

The previous prime is 1688988439. The next prime is 1688988487. The reversal of 1688988466 is 6648898861.

It is a junction number, because it is equal to n+sod(n) for n = 1688988398 and 1688988407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187911 + ... + 196693.

It is an arithmetic number, because the mean of its divisors is an integer number (172776888).

Almost surely, 2^1688988466 is an apocalyptic number.

1688988466 is a deficient number, since it is larger than the sum of its proper divisors (1075441742).

1688988466 is a wasteful number, since it uses less digits than its factorization.

1688988466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17537.

The product of its digits is 31850496, while the sum is 64.

The square root of 1688988466 is about 41097.3048508050. The cubic root of 1688988466 is about 1190.9007294400.

The spelling of 1688988466 in words is "one billion, six hundred eighty-eight million, nine hundred eighty-eight thousand, four hundred sixty-six".