648686028 has 48 divisors (see below), whose sum is σ = 1530368000. Its totient is φ = 213845184.

The previous prime is 648686021. The next prime is 648686041. The reversal of 648686028 is 820686846.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (648686021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 760050 + ... + 760902.

Almost surely, 2^648686028 is an apocalyptic number.

It is an amenable number.

648686028 is an abundant number, since it is smaller than the sum of its proper divisors (881681972).

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

648686028 is a wasteful number, since it uses less digits than its factorization.

648686028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486 (or 1484 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 48.

The square root of 648686028 is about 25469.3154207175. The cubic root of 648686028 is about 865.6550121322.

The spelling of 648686028 in words is "six hundred forty-eight million, six hundred eighty-six thousand, twenty-eight".