648072500 has 30 divisors (see below), whose sum is σ = 1417210410. Its totient is φ = 259228000.

The previous prime is 648072493. The next prime is 648072511. The reversal of 648072500 is 5270846.

It can be written as a sum of positive squares in 5 ways, for example, as 123387664 + 524684836 = 11108^2 + 22906^2 .

It is a congruent number.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 127115 + ... + 132114.

It is an arithmetic number, because the mean of its divisors is an integer number (47240347).

Almost surely, 2^648072500 is an apocalyptic number.

It is an amenable number.

648072500 is an abundant number, since it is smaller than the sum of its proper divisors (769137910).

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

648072500 is a wasteful number, since it uses less digits than its factorization.

648072500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259253 (or 259236 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 648072500 is about 25457.2681173766. The cubic root of 648072500 is about 865.3820135408.

The spelling of 648072500 in words is "six hundred forty-eight million, seventy-two thousand, five hundred".