648328500 has 72 divisors (see below), whose sum is σ = 2045274504. Its totient is φ = 172886400.

The previous prime is 648328487. The next prime is 648328519. The reversal of 648328500 is 5823846.

648328500 is a `hidden beast` number, since 648 + 3 + 2 + 8 + 5 + 0 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2965284 + 645363216 = 1722^2 + 25404^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67537 + ... + 76536.

Almost surely, 2^648328500 is an apocalyptic number.

648328500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

648328500 is an abundant number, since it is smaller than the sum of its proper divisors (1396946004).

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

648328500 is a wasteful number, since it uses less digits than its factorization.

648328500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144098 (or 144083 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 648328500 is about 25462.2956545556. The cubic root of 648328500 is about 865.4959455630.

The spelling of 648328500 in words is "six hundred forty-eight million, three hundred twenty-eight thousand, five hundred".