648794520 has 192 divisors, whose sum is σ = 2421619200. Its totient is φ = 148988160.

The previous prime is 648794513. The next prime is 648794543. The reversal of 648794520 is 25497846.

It is a happy number.

648794520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 70929 + ... + 79551.

It is an arithmetic number, because the mean of its divisors is an integer number (12612600).

Almost surely, 2^648794520 is an apocalyptic number.

648794520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648794520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1210809600).

648794520 is an abundant number, since it is smaller than the sum of its proper divisors (1772824680).

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

648794520 is a wasteful number, since it uses less digits than its factorization.

648794520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8670 (or 8663 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The square root of 648794520 is about 25471.4451886814. The cubic root of 648794520 is about 865.7032693805.

The spelling of 648794520 in words is "six hundred forty-eight million, seven hundred ninety-four thousand, five hundred twenty".