648872780 has 48 divisors (see below), whose sum is σ = 1467777024. Its totient is φ = 240250560.

The previous prime is 648872773. The next prime is 648872789. The reversal of 648872780 is 87278846.

It is not an unprimeable number, because it can be changed into a prime (648872789) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 8492 + ... + 37011.

It is an arithmetic number, because the mean of its divisors is an integer number (30578688).

Almost surely, 2^648872780 is an apocalyptic number.

It is an amenable number.

648872780 is an abundant number, since it is smaller than the sum of its proper divisors (818904244).

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

648872780 is a wasteful number, since it uses less digits than its factorization.

648872780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45566 (or 45564 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 50.

The square root of 648872780 is about 25472.9813724267. The cubic root of 648872780 is about 865.7380760935.

The spelling of 648872780 in words is "six hundred forty-eight million, eight hundred seventy-two thousand, seven hundred eighty".