689800860 has 240 divisors, whose sum is σ = 2517419520. Its totient is φ = 154846080.

The previous prime is 689800849. The next prime is 689800877. The reversal of 689800860 is 68008986.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 668545 + ... + 669575.

It is an arithmetic number, because the mean of its divisors is an integer number (10489248).

Almost surely, 2^689800860 is an apocalyptic number.

689800860 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 689800860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1258709760).

689800860 is an abundant number, since it is smaller than the sum of its proper divisors (1827618660).

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

689800860 is a wasteful number, since it uses less digits than its factorization.

689800860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118 (or 1107 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 689800860 is about 26264.0602344725. The cubic root of 689800860 is about 883.5705738315.

The spelling of 689800860 in words is "six hundred eighty-nine million, eight hundred thousand, eight hundred sixty".