1647398446 has 8 divisors (see below), whose sum is σ = 2504948544. Its totient is φ = 812415600.

The previous prime is 1647398383. The next prime is 1647398449. The reversal of 1647398446 is 6448937461.

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

It is a junction number, because it is equal to n+sod(n) for n = 1647398393 and 1647398402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1647398449) 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, 5641630 + ... + 5641921.

It is an arithmetic number, because the mean of its divisors is an integer number (313118568).

Almost surely, 2^1647398446 is an apocalyptic number.

1647398446 is a deficient number, since it is larger than the sum of its proper divisors (857550098).

1647398446 is a wasteful number, since it uses less digits than its factorization.

1647398446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11283626.

The product of its digits is 3483648, while the sum is 52.

The square root of 1647398446 is about 40588.1564745185. The cubic root of 1647398446 is about 1181.0443798906.

The spelling of 1647398446 in words is "one billion, six hundred forty-seven million, three hundred ninety-eight thousand, four hundred forty-six".