647238398 has 8 divisors (see below), whose sum is σ = 1002175680. Its totient is φ = 313179840.

The previous prime is 647238379. The next prime is 647238407. The reversal of 647238398 is 893832746.

647238398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5219603 + ... + 5219726.

It is an arithmetic number, because the mean of its divisors is an integer number (125271960).

Almost surely, 2^647238398 is an apocalyptic number.

647238398 is a deficient number, since it is larger than the sum of its proper divisors (354937282).

647238398 is a wasteful number, since it uses less digits than its factorization.

647238398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10439362.

The product of its digits is 1741824, while the sum is 50.

The square root of 647238398 is about 25440.8804486008. The cubic root of 647238398 is about 865.0105907131.

The spelling of 647238398 in words is "six hundred forty-seven million, two hundred thirty-eight thousand, three hundred ninety-eight".