6447406 has 16 divisors (see below), whose sum is σ = 11533824. Its totient is φ = 2642904.

The previous prime is 6447391. The next prime is 6447407. The reversal of 6447406 is 6047446.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6447407) 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, 9690 + ... + 10333.

It is an arithmetic number, because the mean of its divisors is an integer number (720864).

Almost surely, 2^6447406 is an apocalyptic number.

6447406 is a deficient number, since it is larger than the sum of its proper divisors (5086418).

6447406 is a wasteful number, since it uses less digits than its factorization.

6447406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20055.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 6447406 is about 2539.1742752320. The cubic root of 6447406 is about 186.1208410414.

The spelling of 6447406 in words is "six million, four hundred forty-seven thousand, four hundred six".