648877928 has 8 divisors (see below), whose sum is σ = 1216646130. Its totient is φ = 324438960.

The previous prime is 648877903. The next prime is 648877937. The reversal of 648877928 is 829778846.

648877928 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 647295364 + 1582564 = 25442^2 + 1258^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40554863 + ... + 40554878.

Almost surely, 2^648877928 is an apocalyptic number.

It is an amenable number.

648877928 is a deficient number, since it is larger than the sum of its proper divisors (567768202).

648877928 is a wasteful number, since it uses less digits than its factorization.

648877928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81109747 (or 81109743 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 59.

The square root of 648877928 is about 25473.0824204689. The cubic root of 648877928 is about 865.7403656065.

The spelling of 648877928 in words is "six hundred forty-eight million, eight hundred seventy-seven thousand, nine hundred twenty-eight".