6478989 has 16 divisors (see below), whose sum is σ = 9979200. Its totient is φ = 3695360.

The previous prime is 6478973. The next prime is 6478991. The reversal of 6478989 is 9898746.

It is a happy number.

6478989 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 6478989 - 2⁴ = 6478973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

6478989 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6478949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5214 + ... + 6335.

It is an arithmetic number, because the mean of its divisors is an integer number (623700).

Almost surely, 2^6478989 is an apocalyptic number.

It is an amenable number.

6478989 is a deficient number, since it is larger than the sum of its proper divisors (3500211).

6478989 is a wasteful number, since it uses less digits than its factorization.

6478989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11580.

The product of its digits is 870912, while the sum is 51.

The square root of 6478989 is about 2545.3858253711. The cubic root of 6478989 is about 186.4242541367.

The spelling of 6478989 in words is "six million, four hundred seventy-eight thousand, nine hundred eighty-nine".