648045920 has 48 divisors (see below), whose sum is σ = 1611595440. Its totient is φ = 245574144.

The previous prime is 648045887. The next prime is 648045941. The reversal of 648045920 is 29540846.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103547 + ... + 109626.

It is an arithmetic number, because the mean of its divisors is an integer number (33574905).

Almost surely, 2^648045920 is an apocalyptic number.

It is an amenable number.

648045920 is an abundant number, since it is smaller than the sum of its proper divisors (963549520).

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

648045920 is a wasteful number, since it uses less digits than its factorization.

648045920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213207 (or 213199 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 648045920 is about 25456.7460607203. The cubic root of 648045920 is about 865.3701824733.

The spelling of 648045920 in words is "six hundred forty-eight million, forty-five thousand, nine hundred twenty".