648265728 has 180 divisors, whose sum is σ = 1917524840. Its totient is φ = 194641920.

The previous prime is 648265711. The next prime is 648265729. The reversal of 648265728 is 827562846.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648265729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5947338 + ... + 5947446.

Almost surely, 2^648265728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648265728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (958762420).

648265728 is an abundant number, since it is smaller than the sum of its proper divisors (1269259112).

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

648265728 is a wasteful number, since it uses less digits than its factorization.

648265728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162 (or 125 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 48.

The square root of 648265728 is about 25461.0629785954. The cubic root of 648265728 is about 865.4680118509.

The spelling of 648265728 in words is "six hundred forty-eight million, two hundred sixty-five thousand, seven hundred twenty-eight".