689816 has 24 divisors (see below), whose sum is σ = 1360380. Its totient is φ = 327888.

The previous prime is 689807. The next prime is 689827. The reversal of 689816 is 618986.

It is a super-2 number, since 2×689816² = 951692227712, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 689816.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4151 + ... + 4313.

2⁶⁸⁹⁸¹⁶ is an apocalyptic number.

It is an amenable number.

689816 is a deficient number, since it is larger than the sum of its proper divisors (670564).

689816 is a wasteful number, since it uses less digits than its factorization.

689816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215 (or 188 counting only the distinct ones).

The product of its digits is 20736, while the sum is 38.

The square root of 689816 is about 830.5516239223. The cubic root of 689816 is about 88.3577038094.

The spelling of 689816 in words is "six hundred eighty-nine thousand, eight hundred sixteen".