647617248 has 48 divisors (see below), whose sum is σ = 1888886160. Its totient is φ = 215872128.

The previous prime is 647617213. The next prime is 647617259. The reversal of 647617248 is 842716746.

647617248 is a `hidden beast` number, since 6 + 4 + 7 + 617 + 24 + 8 = 666.

647617248 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 373915 + ... + 375642.

It is an arithmetic number, because the mean of its divisors is an integer number (39351795).

Almost surely, 2^647617248 is an apocalyptic number.

It is an amenable number.

647617248 is an abundant number, since it is smaller than the sum of its proper divisors (1241268912).

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

647617248 is a wasteful number, since it uses less digits than its factorization.

647617248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749576 (or 749562 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 647617248 is about 25448.3250529382. The cubic root of 647617248 is about 865.1793308787.

The spelling of 647617248 in words is "six hundred forty-seven million, six hundred seventeen thousand, two hundred forty-eight".