689650 has 24 divisors (see below), whose sum is σ = 1382724. Its totient is φ = 254400.

The previous prime is 689641. The next prime is 689693. The reversal of 689650 is 56986.

689650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 175561 + 514089 = 419^2 + 717^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120 + ... + 1180.

2⁶⁸⁹⁶⁵⁰ is an apocalyptic number.

689650 is an abundant number, since it is smaller than the sum of its proper divisors (693074).

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

689650 is a wasteful number, since it uses less digits than its factorization.

689650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086 (or 1081 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 689650 is about 830.4516843261. The cubic root of 689650 is about 88.3506156605.

The spelling of 689650 in words is "six hundred eighty-nine thousand, six hundred fifty".