648279928 has 16 divisors (see below), whose sum is σ = 1223685000. Its totient is φ = 321963936.

The previous prime is 648279901. The next prime is 648279953. The reversal of 648279928 is 829972846.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270738 + ... + 273121.

Almost surely, 2^648279928 is an apocalyptic number.

It is an amenable number.

648279928 is a deficient number, since it is larger than the sum of its proper divisors (575405072).

648279928 is a wasteful number, since it uses less digits than its factorization.

648279928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544014 (or 544010 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 55.

The square root of 648279928 is about 25461.3418342396. The cubic root of 648279928 is about 865.4743310476.

The spelling of 648279928 in words is "six hundred forty-eight million, two hundred seventy-nine thousand, nine hundred twenty-eight".