648408216 has 32 divisors (see below), whose sum is σ = 1676919600. Its totient is φ = 208682880.

The previous prime is 648408199. The next prime is 648408227. The reversal of 648408216 is 612804846.

648408216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 465115 + ... + 466506.

Almost surely, 2^648408216 is an apocalyptic number.

It is an amenable number.

648408216 is an abundant number, since it is smaller than the sum of its proper divisors (1028511384).

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

648408216 is a wasteful number, since it uses less digits than its factorization.

648408216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931659 (or 931655 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 648408216 is about 25463.8609798279. The cubic root of 648408216 is about 865.5314168029.

The spelling of 648408216 in words is "six hundred forty-eight million, four hundred eight thousand, two hundred sixteen".