647246740 has 24 divisors (see below), whose sum is σ = 1553392512. Its totient is φ = 221913120.

The previous prime is 647246731. The next prime is 647246771. The reversal of 647246740 is 47642746.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 647246693 and 647246702.

It is a congruent number.

It is an unprimeable number.

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, 2311456 + ... + 2311735.

It is an arithmetic number, because the mean of its divisors is an integer number (64724688).

Almost surely, 2^647246740 is an apocalyptic number.

It is an amenable number.

647246740 is an abundant number, since it is smaller than the sum of its proper divisors (906145772).

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

647246740 is a wasteful number, since it uses less digits than its factorization.

647246740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4623207 (or 4623205 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 40.

The square root of 647246740 is about 25441.0443968010. The cubic root of 647246740 is about 865.0143069571.

The spelling of 647246740 in words is "six hundred forty-seven million, two hundred forty-six thousand, seven hundred forty".