689250918720 has 336 divisors, whose sum is σ = 2741479026048. Its totient is φ = 145424240640.

The previous prime is 689250918683. The next prime is 689250918721. The reversal of 689250918720 is 27819052986.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (336).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689250918721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 47965 + ... + 1175075.

It is an arithmetic number, because the mean of its divisors is an integer number (8159163768).

Almost surely, 2^689250918720 is an apocalyptic number.

689250918720 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 689250918720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1370739513024).

689250918720 is an abundant number, since it is smaller than the sum of its proper divisors (2052228107328).

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

689250918720 is a wasteful number, since it uses less digits than its factorization.

689250918720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127158 (or 1127141 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 57.

The spelling of 689250918720 in words is "six hundred eighty-nine billion, two hundred fifty million, nine hundred eighteen thousand, seven hundred twenty".