648487020 has 96 divisors (see below), whose sum is σ = 1853300736. Its totient is φ = 169388800.

The previous prime is 648487003. The next prime is 648487027. The reversal of 648487020 is 20784846.

It is a self number, because there is not a number n which added to its sum of digits gives 648487020.

It is not an unprimeable number, because it can be changed into a prime (648487027) 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 31 ways as a sum of consecutive naturals, for example, 813262 + ... + 814058.

It is an arithmetic number, because the mean of its divisors is an integer number (19305216).

Almost surely, 2^648487020 is an apocalyptic number.

648487020 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 648487020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (926650368).

648487020 is an abundant number, since it is smaller than the sum of its proper divisors (1204813716).

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

648487020 is a wasteful number, since it uses less digits than its factorization.

648487020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071 (or 1069 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 39.

The square root of 648487020 is about 25465.4083022440. The cubic root of 648487020 is about 865.5664793726.

The spelling of 648487020 in words is "six hundred forty-eight million, four hundred eighty-seven thousand, twenty".