648305442 has 48 divisors (see below), whose sum is σ = 1431680640. Its totient is φ = 211981536.

The previous prime is 648305429. The next prime is 648305443. The reversal of 648305442 is 244503846.

648305442 is a `hidden beast` number, since 648 + 3 + 0 + 5 + 4 + 4 + 2 = 666.

It is a super-2 number, since 2×648305442² = 840599892253630728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 648305397 and 648305406.

It is not an unprimeable number, because it can be changed into a prime (648305443) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 230388 + ... + 233184.

It is an arithmetic number, because the mean of its divisors is an integer number (29826680).

Almost surely, 2^648305442 is an apocalyptic number.

648305442 is an abundant number, since it is smaller than the sum of its proper divisors (783375198).

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

648305442 is a wasteful number, since it uses less digits than its factorization.

648305442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3047 (or 3044 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

The square root of 648305442 is about 25461.8428633907. The cubic root of 648305442 is about 865.4856848993.

The spelling of 648305442 in words is "six hundred forty-eight million, three hundred five thousand, four hundred forty-two".