689420189920 has 576 divisors, whose sum is σ = 2093998169088. Its totient is φ = 209909145600.

The previous prime is 689420189881. The next prime is 689420189921. The reversal of 689420189920 is 29981024986.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689420189921) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1318202779 + ... + 1318203301.

It is an arithmetic number, because the mean of its divisors is an integer number (3635413488).

Almost surely, 2^689420189920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 689420189920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1046999084544).

689420189920 is an abundant number, since it is smaller than the sum of its proper divisors (1404577979168).

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

689420189920 is a wasteful number, since it uses less digits than its factorization.

689420189920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775 (or 756 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 58.

The spelling of 689420189920 in words is "six hundred eighty-nine billion, four hundred twenty million, one hundred eighty-nine thousand, nine hundred twenty".