6478689 has 8 divisors (see below), whose sum is σ = 9872320. Its totient is φ = 3702096.

The previous prime is 6478673. The next prime is 6478723. The reversal of 6478689 is 9868746.

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

It is not a de Polignac number, because 6478689 - 2⁴ = 6478673 is a prime.

It is a super-2 number, since 2×6478689² = 83946822317442, which contains 22 as substring.

It is a Duffinian number.

6478689 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6478489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154234 + ... + 154275.

It is an arithmetic number, because the mean of its divisors is an integer number (1234040).

Almost surely, 2^6478689 is an apocalyptic number.

It is an amenable number.

6478689 is a deficient number, since it is larger than the sum of its proper divisors (3393631).

6478689 is a wasteful number, since it uses less digits than its factorization.

6478689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308519.

The product of its digits is 580608, while the sum is 48.

The square root of 6478689 is about 2545.3268945265. The cubic root of 6478689 is about 186.4213767259.

The spelling of 6478689 in words is "six million, four hundred seventy-eight thousand, six hundred eighty-nine".