689343690 has 64 divisors (see below), whose sum is σ = 1903380480. Its totient is φ = 156513600.

The previous prime is 689343667. The next prime is 689343703. The reversal of 689343690 is 96343986.

It is a super-2 number, since 2×689343690² = 950389445885632200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20841 + ... + 42579.

It is an arithmetic number, because the mean of its divisors is an integer number (29740320).

Almost surely, 2^689343690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 689343690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (951690240).

689343690 is an abundant number, since it is smaller than the sum of its proper divisors (1214036790).

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

689343690 is a wasteful number, since it uses less digits than its factorization.

689343690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21907.

The product of its (nonzero) digits is 839808, while the sum is 48.

The square root of 689343690 is about 26255.3554536974. The cubic root of 689343690 is about 883.3753333141.

The spelling of 689343690 in words is "six hundred eighty-nine million, three hundred forty-three thousand, six hundred ninety".