648709684 has 12 divisors (see below), whose sum is σ = 1297419424. Its totient is φ = 278018424.

The previous prime is 648709679. The next prime is 648709693. The reversal of 648709684 is 486907846.

It is a happy number.

648709684 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 11584074 + ... + 11584129.

Almost surely, 2^648709684 is an apocalyptic number.

It is an amenable number.

648709684 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

648709684 is a wasteful number, since it uses less digits than its factorization.

648709684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23168214 (or 23168212 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 52.

The square root of 648709684 is about 25469.7798184437. The cubic root of 648709684 is about 865.6655347811.

The spelling of 648709684 in words is "six hundred forty-eight million, seven hundred nine thousand, six hundred eighty-four".