689189310 has 64 divisors (see below), whose sum is σ = 1860586560. Its totient is φ = 183777984.

The previous prime is 689189309. The next prime is 689189317. The reversal of 689189310 is 13981986.

It is a super-2 number, since 2×689189310² = 949963810036552200, which contains 22 as substring.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689189317) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6114 + ... + 37626.

It is an arithmetic number, because the mean of its divisors is an integer number (29071665).

Almost surely, 2^689189310 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 689189310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (930293280).

689189310 is an abundant number, since it is smaller than the sum of its proper divisors (1171397250).

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

689189310 is an equidigital number, since it uses as much as digits as its factorization.

689189310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31541 (or 31523 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 689189310 is about 26252.4153174522. The cubic root of 689189310 is about 883.3093837896.

The spelling of 689189310 in words is "six hundred eighty-nine million, one hundred eighty-nine thousand, three hundred ten".