647258385 has 32 divisors (see below), whose sum is σ = 1061890560. Its totient is φ = 336505088.

The previous prime is 647258383. The next prime is 647258407. The reversal of 647258385 is 583852746.

It is a cyclic number.

It is not a de Polignac number, because 647258385 - 2¹ = 647258383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (647258383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 187939 + ... + 191351.

It is an arithmetic number, because the mean of its divisors is an integer number (33184080).

Almost surely, 2^647258385 is an apocalyptic number.

It is an amenable number.

647258385 is a deficient number, since it is larger than the sum of its proper divisors (414632175).

647258385 is a wasteful number, since it uses less digits than its factorization.

647258385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3737.

The product of its digits is 1612800, while the sum is 48.

The square root of 647258385 is about 25441.2732582314. The cubic root of 647258385 is about 865.0194945878.

The spelling of 647258385 in words is "six hundred forty-seven million, two hundred fifty-eight thousand, three hundred eighty-five".