1688690382 has 16 divisors (see below), whose sum is σ = 3378484560. Its totient is φ = 562712832.

The previous prime is 1688690357. The next prime is 1688690413. The reversal of 1688690382 is 2830968861.

It is a congruent number.

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, 25393 + ... + 63420.

It is an arithmetic number, because the mean of its divisors is an integer number (211155285).

Almost surely, 2^1688690382 is an apocalyptic number.

1688690382 is an abundant number, since it is smaller than the sum of its proper divisors (1689794178).

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

1688690382 is a wasteful number, since it uses less digits than its factorization.

1688690382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91987.

The product of its (nonzero) digits is 995328, while the sum is 51.

The square root of 1688690382 is about 41093.6781269333. The cubic root of 1688690382 is about 1190.8306659383.

The spelling of 1688690382 in words is "one billion, six hundred eighty-eight million, six hundred ninety thousand, three hundred eighty-two".