689463844 has 12 divisors (see below), whose sum is σ = 1210827184. Its totient is φ = 343513224.

The previous prime is 689463829. The next prime is 689463851. The reversal of 689463844 is 448364986.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 689463791 and 689463800.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303402 + ... + 305665.

Almost surely, 2^689463844 is an apocalyptic number.

It is an amenable number.

689463844 is a deficient number, since it is larger than the sum of its proper divisors (521363340).

689463844 is a wasteful number, since it uses less digits than its factorization.

689463844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609354 (or 609352 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 52.

The square root of 689463844 is about 26257.6435347881. The cubic root of 689463844 is about 883.4266550351.

The spelling of 689463844 in words is "six hundred eighty-nine million, four hundred sixty-three thousand, eight hundred forty-four".