647446 has 8 divisors (see below), whose sum is σ = 979200. Its totient is φ = 321048.

The previous prime is 647441. The next prime is 647453. The reversal of 647446 is 644746.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647441) by changing a digit.

647446 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1021 + ... + 1528.

It is an arithmetic number, because the mean of its divisors is an integer number (122400).

2⁶⁴⁷⁴⁴⁶ is an apocalyptic number.

647446 is a deficient number, since it is larger than the sum of its proper divisors (331754).

647446 is a wasteful number, since it uses less digits than its factorization.

647446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2678.

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

The square root of 647446 is about 804.6402923046. The cubic root of 647446 is about 86.5103065002.

The spelling of 647446 in words is "six hundred forty-seven thousand, four hundred forty-six".