6456478 has 16 divisors (see below), whose sum is σ = 11129184. Its totient is φ = 2751840.

The previous prime is 6456469. The next prime is 6456479. The reversal of 6456478 is 8746546.

It is a super-2 number, since 2×6456478² = 83372216328968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6456478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6456479) 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, 1588 + ... + 3928.

It is an arithmetic number, because the mean of its divisors is an integer number (695574).

Almost surely, 2^6456478 is an apocalyptic number.

6456478 is a deficient number, since it is larger than the sum of its proper divisors (4672706).

6456478 is a wasteful number, since it uses less digits than its factorization.

6456478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2547.

The product of its digits is 161280, while the sum is 40.

The square root of 6456478 is about 2540.9600547824. The cubic root of 6456478 is about 186.2080956130.

The spelling of 6456478 in words is "six million, four hundred fifty-six thousand, four hundred seventy-eight".