689787648 has 216 divisors, whose sum is σ = 2298690576. Its totient is φ = 196608000.

The previous prime is 689787629. The next prime is 689787667. The reversal of 689787648 is 846787986.

It is an interprime number because it is at equal distance from previous prime (689787629) and next prime (689787667).

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 23 ways as a sum of consecutive naturals, for example, 430048 + ... + 431648.

It is an arithmetic number, because the mean of its divisors is an integer number (10642086).

Almost surely, 2^689787648 is an apocalyptic number.

689787648 is a gapful number since it is divisible by the number (68) 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 689787648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1149345288).

689787648 is an abundant number, since it is smaller than the sum of its proper divisors (1608902928).

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

689787648 is a wasteful number, since it uses less digits than its factorization.

689787648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1651 (or 1634 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 63.

The square root of 689787648 is about 26263.8087108477. The cubic root of 689787648 is about 883.5649326822.

The spelling of 689787648 in words is "six hundred eighty-nine million, seven hundred eighty-seven thousand, six hundred forty-eight".