689398090000 has 375 divisors, whose sum is σ = 1841760622163. Its totient is φ = 249887088000.

The previous prime is 689398089973. The next prime is 689398090021. The reversal of 689398090000 is 90893986.

The square root of 689398090000 is 830300.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 54048810256 + 635349279744 = 232484^2 + 797088^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 689398090000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 74 ways as a sum of consecutive naturals, for example, 29973829989 + ... + 29973830011.

Almost surely, 2^689398090000 is an apocalyptic number.

689398090000 is the 830300-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 689398090000

689398090000 is an abundant number, since it is smaller than the sum of its proper divisors (1152362532163).

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

689398090000 is an frugal number, since it uses more digits than its factorization.

689398090000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 52.

The spelling of 689398090000 in words is "six hundred eighty-nine billion, three hundred ninety-eight million, ninety thousand".