689628190838 has 4 divisors (see below), whose sum is σ = 1034442286260. Its totient is φ = 344814095418.

The previous prime is 689628190817. The next prime is 689628190841. The reversal of 689628190838 is 838091826986.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172407047708 + ... + 172407047711.

It is an arithmetic number, because the mean of its divisors is an integer number (258610571565).

Almost surely, 2^689628190838 is an apocalyptic number.

689628190838 is a deficient number, since it is larger than the sum of its proper divisors (344814095422).

689628190838 is a wasteful number, since it uses less digits than its factorization.

689628190838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344814095421.

The product of its (nonzero) digits is 71663616, while the sum is 68.

The spelling of 689628190838 in words is "six hundred eighty-nine billion, six hundred twenty-eight million, one hundred ninety thousand, eight hundred thirty-eight".