689218436 has 12 divisors (see below), whose sum is σ = 1221400320. Its totient is φ = 340246920.

The previous prime is 689218429. The next prime is 689218447. The reversal of 689218436 is 634812986.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1090220 + ... + 1090851.

It is an arithmetic number, because the mean of its divisors is an integer number (101783360).

Almost surely, 2^689218436 is an apocalyptic number.

It is an amenable number.

689218436 is a deficient number, since it is larger than the sum of its proper divisors (532181884).

689218436 is a wasteful number, since it uses less digits than its factorization.

689218436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181154 (or 2181152 counting only the distinct ones).

The product of its digits is 497664, while the sum is 47.

The square root of 689218436 is about 26252.9700415020. The cubic root of 689218436 is about 883.3218268665.

The spelling of 689218436 in words is "six hundred eighty-nine million, two hundred eighteen thousand, four hundred thirty-six".