648039960 has 128 divisors (see below), whose sum is σ = 2172024000. Its totient is φ = 171859968.

The previous prime is 648039929. The next prime is 648039991. The reversal of 648039960 is 69930846.

It is an interprime number because it is at equal distance from previous prime (648039929) and next prime (648039991).

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

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 206886 + ... + 209994.

Almost surely, 2^648039960 is an apocalyptic number.

648039960 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 648039960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1086012000).

648039960 is an abundant number, since it is smaller than the sum of its proper divisors (1523984040).

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

648039960 is a wasteful number, since it uses less digits than its factorization.

648039960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3322 (or 3312 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 648039960 is about 25456.6289991428. The cubic root of 648039960 is about 865.3675295635.

The spelling of 648039960 in words is "six hundred forty-eight million, thirty-nine thousand, nine hundred sixty".