689478 has 8 divisors (see below), whose sum is σ = 1378968. Its totient is φ = 229824.

The previous prime is 689467. The next prime is 689509. The reversal of 689478 is 874986.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

689478 is an admirable number.

It is a Curzon number.

It is a congruent number.

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, 57451 + ... + 57462.

It is an arithmetic number, because the mean of its divisors is an integer number (172371).

2⁶⁸⁹⁴⁷⁸ is an apocalyptic number.

689478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

689478 is a wasteful number, since it uses less digits than its factorization.

689478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114918.

The product of its digits is 96768, while the sum is 42.

The square root of 689478 is about 830.3481197666. The cubic root of 689478 is about 88.3432701135.

The spelling of 689478 in words is "six hundred eighty-nine thousand, four hundred seventy-eight".