1688194434 has 32 divisors (see below), whose sum is σ = 3609131904. Its totient is φ = 525134720.

The previous prime is 1688194433. The next prime is 1688194439. The reversal of 1688194434 is 4344918861.

1688194434 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1688194433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143529 + ... + 154844.

It is an arithmetic number, because the mean of its divisors is an integer number (112785372).

Almost surely, 2^1688194434 is an apocalyptic number.

1688194434 is an abundant number, since it is smaller than the sum of its proper divisors (1920937470).

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

1688194434 is a wasteful number, since it uses less digits than its factorization.

1688194434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298442.

The product of its digits is 663552, while the sum is 48.

The square root of 1688194434 is about 41087.6433249706. The cubic root of 1688194434 is about 1190.7140769888.

The spelling of 1688194434 in words is "one billion, six hundred eighty-eight million, one hundred ninety-four thousand, four hundred thirty-four".