6447290 has 8 divisors (see below), whose sum is σ = 11605140. Its totient is φ = 2578912.

The previous prime is 6447283. The next prime is 6447293. The reversal of 6447290 is 927446.

It can be written as a sum of positive squares in 2 ways, for example, as 6086089 + 361201 = 2467^2 + 601^2 .

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

It is not an unprimeable number, because it can be changed into a prime (6447293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322355 + ... + 322374.

Almost surely, 2^6447290 is an apocalyptic number.

6447290 is a deficient number, since it is larger than the sum of its proper divisors (5157850).

6447290 is a wasteful number, since it uses less digits than its factorization.

6447290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644736.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 6447290 is about 2539.1514330579. The cubic root of 6447290 is about 186.1197248227.

The spelling of 6447290 in words is "six million, four hundred forty-seven thousand, two hundred ninety".