648348885 has 12 divisors (see below), whose sum is σ = 1123804812. Its totient is φ = 345786048.

The previous prime is 648348881. The next prime is 648348887. The reversal of 648348885 is 588843846.

648348885 is a `hidden beast` number, since 6 + 4 + 83 + 488 + 85 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 245423556 + 402925329 = 15666^2 + 20073^2 .

It is not a de Polignac number, because 648348885 - 2² = 648348881 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648348881) 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 11 ways as a sum of consecutive naturals, for example, 7203832 + ... + 7203921.

It is an arithmetic number, because the mean of its divisors is an integer number (93650401).

Almost surely, 2^648348885 is an apocalyptic number.

It is an amenable number.

648348885 is a deficient number, since it is larger than the sum of its proper divisors (475455927).

648348885 is a wasteful number, since it uses less digits than its factorization.

648348885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14407764 (or 14407761 counting only the distinct ones).

The product of its digits is 5898240, while the sum is 54.

The square root of 648348885 is about 25462.6959491724. The cubic root of 648348885 is about 865.5050165560.

The spelling of 648348885 in words is "six hundred forty-eight million, three hundred forty-eight thousand, eight hundred eighty-five".