648428508 has 72 divisors (see below), whose sum is σ = 2017343328. Its totient is φ = 171013248.

The previous prime is 648428503. The next prime is 648428513. The reversal of 648428508 is 805824846.

648428508 is a `hidden beast` number, since 64 + 84 + 2 + 8 + 508 = 666.

It is an interprime number because it is at equal distance from previous prime (648428503) and next prime (648428513).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648428503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95691 + ... + 102242.

Almost surely, 2^648428508 is an apocalyptic number.

It is an amenable number.

648428508 is an abundant number, since it is smaller than the sum of its proper divisors (1368914820).

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

648428508 is a wasteful number, since it uses less digits than its factorization.

648428508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197963 (or 197958 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 45.

The square root of 648428508 is about 25464.2594237492. The cubic root of 648428508 is about 865.5404456728.

The spelling of 648428508 in words is "six hundred forty-eight million, four hundred twenty-eight thousand, five hundred eight".