6478940 has 24 divisors (see below), whose sum is σ = 14652960. Its totient is φ = 2392128.

The previous prime is 6478937. The next prime is 6478949. The reversal of 6478940 is 498746.

It is a happy number.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6478894 and 6478903.

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 7 ways as a sum of consecutive naturals, for example, 12200 + ... + 12719.

It is an arithmetic number, because the mean of its divisors is an integer number (610540).

Almost surely, 2^6478940 is an apocalyptic number.

It is an amenable number.

6478940 is an abundant number, since it is smaller than the sum of its proper divisors (8174020).

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

6478940 is a wasteful number, since it uses less digits than its factorization.

6478940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24941 (or 24939 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 6478940 is about 2545.3762000930. The cubic root of 6478940 is about 186.4237841657.

The spelling of 6478940 in words is "six million, four hundred seventy-eight thousand, nine hundred forty".