647480052 has 36 divisors (see below), whose sum is σ = 1639084356. Its totient is φ = 215510400.

The previous prime is 647480039. The next prime is 647480069. The reversal of 647480052 is 250084746.

647480052 is a `hidden beast` number, since 647 + 4 + 8 + 0 + 0 + 5 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 388720656 + 258759396 = 19716^2 + 16086^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 647479989 and 647480016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12408 + ... + 38064.

It is an arithmetic number, because the mean of its divisors is an integer number (45530121).

Almost surely, 2^647480052 is an apocalyptic number.

It is an amenable number.

647480052 is an abundant number, since it is smaller than the sum of its proper divisors (991604304).

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

647480052 is a wasteful number, since it uses less digits than its factorization.

647480052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26368 (or 26363 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 647480052 is about 25445.6293300048. The cubic root of 647480052 is about 865.1182312468.

The spelling of 647480052 in words is "six hundred forty-seven million, four hundred eighty thousand, fifty-two".