648990588 has 12 divisors (see below), whose sum is σ = 1514311400. Its totient is φ = 216330192.

The previous prime is 648990553. The next prime is 648990593. The reversal of 648990588 is 885099846.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27041263 + ... + 27041286.

Almost surely, 2^648990588 is an apocalyptic number.

It is an amenable number.

648990588 is an abundant number, since it is smaller than the sum of its proper divisors (865320812).

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

648990588 is a wasteful number, since it uses less digits than its factorization.

648990588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54082556 (or 54082554 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 57.

The square root of 648990588 is about 25475.2936783857. The cubic root of 648990588 is about 865.7904667946.

The spelling of 648990588 in words is "six hundred forty-eight million, nine hundred ninety thousand, five hundred eighty-eight".