648447912 has 96 divisors (see below), whose sum is σ = 2053846080. Its totient is φ = 180956160.

The previous prime is 648447893. The next prime is 648447929. The reversal of 648447912 is 219744846.

It is a nude number because it is divisible by every one of its digits.

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, 6712 + ... + 36632.

It is an arithmetic number, because the mean of its divisors is an integer number (21394230).

Almost surely, 2^648447912 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 648447912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1026923040).

648447912 is an abundant number, since it is smaller than the sum of its proper divisors (1405398168).

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

648447912 is a wasteful number, since it uses less digits than its factorization.

648447912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29983 (or 29976 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 648447912 is about 25464.6404254998. The cubic root of 648447912 is about 865.5490792534.

The spelling of 648447912 in words is "six hundred forty-eight million, four hundred forty-seven thousand, nine hundred twelve".