647148768 has 48 divisors (see below), whose sum is σ = 1941448320. Its totient is φ = 184899456.

The previous prime is 647148763. The next prime is 647148791. The reversal of 647148768 is 867841746.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 647148768.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647148763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480838 + ... + 482181.

It is an arithmetic number, because the mean of its divisors is an integer number (40446840).

Almost surely, 2^647148768 is an apocalyptic number.

It is an amenable number.

647148768 is an abundant number, since it is smaller than the sum of its proper divisors (1294299552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

647148768 is a wasteful number, since it uses less digits than its factorization.

647148768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963039 (or 963031 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 51.

The square root of 647148768 is about 25439.1188526647. The cubic root of 647148768 is about 864.9706597909.

The spelling of 647148768 in words is "six hundred forty-seven million, one hundred forty-eight thousand, seven hundred sixty-eight".