648005424 has 80 divisors (see below), whose sum is σ = 1837382400. Its totient is φ = 195162880.

The previous prime is 648005417. The next prime is 648005429. The reversal of 648005424 is 424500846.

It is a super-2 number, since 2×648005424² = 839822059066839552, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (648005429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84502 + ... + 91850.

It is an arithmetic number, because the mean of its divisors is an integer number (22967280).

Almost surely, 2^648005424 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 648005424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (918691200).

648005424 is an abundant number, since it is smaller than the sum of its proper divisors (1189376976).

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

648005424 is a wasteful number, since it uses less digits than its factorization.

648005424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7538 (or 7532 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 33.

The square root of 648005424 is about 25455.9506599145. The cubic root of 648005424 is about 865.3521566103.

The spelling of 648005424 in words is "six hundred forty-eight million, five thousand, four hundred twenty-four".