647076838 has 8 divisors (see below), whose sum is σ = 975542832. Its totient is φ = 321895896.

The previous prime is 647076809. The next prime is 647076839. The reversal of 647076838 is 838670746.

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 = 647076791 and 647076800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647076839) 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, 820770 + ... + 821557.

It is an arithmetic number, because the mean of its divisors is an integer number (121942854).

Almost surely, 2^647076838 is an apocalyptic number.

647076838 is a deficient number, since it is larger than the sum of its proper divisors (328465994).

647076838 is a wasteful number, since it uses less digits than its factorization.

647076838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642526.

The product of its (nonzero) digits is 1354752, while the sum is 49.

The square root of 647076838 is about 25437.7050458566. The cubic root of 647076838 is about 864.9386117014.

The spelling of 647076838 in words is "six hundred forty-seven million, seventy-six thousand, eight hundred thirty-eight".