689378880 has 112 divisors (see below), whose sum is σ = 2195072064. Its totient is φ = 183306240.

The previous prime is 689378861. The next prime is 689378891. The reversal of 689378880 is 88873986.

It is a self number, because there is not a number n which added to its sum of digits gives 689378880.

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 15 ways as a sum of consecutive naturals, for example, 424470 + ... + 426090.

Almost surely, 2^689378880 is an apocalyptic number.

689378880 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 689378880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1097536032).

689378880 is an abundant number, since it is smaller than the sum of its proper divisors (1505693184).

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

689378880 is a wasteful number, since it uses less digits than its factorization.

689378880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2084 (or 2074 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 57.

The square root of 689378880 is about 26256.0255941374. The cubic root of 689378880 is about 883.3903647367.

The spelling of 689378880 in words is "six hundred eighty-nine million, three hundred seventy-eight thousand, eight hundred eighty".