689920842060 has 144 divisors (see below), whose sum is σ = 2170640568096. Its totient is φ = 183947438592.

The previous prime is 689920842041. The next prime is 689920842071. The reversal of 689920842060 is 60248029986.

It is a happy number.

689920842060 is a `hidden beast` number, since 6 + 8 + 9 + 9 + 208 + 420 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 689920841988 and 689920842006.

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 47 ways as a sum of consecutive naturals, for example, 47781162 + ... + 47795598.

It is an arithmetic number, because the mean of its divisors is an integer number (15073892834).

Almost surely, 2^689920842060 is an apocalyptic number.

689920842060 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 689920842060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1085320284048).

689920842060 is an abundant number, since it is smaller than the sum of its proper divisors (1480719726036).

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

689920842060 is a wasteful number, since it uses less digits than its factorization.

689920842060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24294 (or 24280 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The spelling of 689920842060 in words is "six hundred eighty-nine billion, nine hundred twenty million, eight hundred forty-two thousand, sixty".