648244404 has 48 divisors (see below), whose sum is σ = 1697987200. Its totient is φ = 213850368.

The previous prime is 648244381. The next prime is 648244409. The reversal of 648244404 is 404442846.

648244404 is a `hidden beast` number, since 6 + 4 + 8 + 244 + 404 = 666.

648244404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648244409) 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, 20464 + ... + 41415.

Almost surely, 2^648244404 is an apocalyptic number.

It is an amenable number.

648244404 is an abundant number, since it is smaller than the sum of its proper divisors (1049742796).

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

648244404 is a wasteful number, since it uses less digits than its factorization.

648244404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61989 (or 61981 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 36.

The square root of 648244404 is about 25460.6442180869. The cubic root of 648244404 is about 865.4585222021.

The spelling of 648244404 in words is "six hundred forty-eight million, two hundred forty-four thousand, four hundred four".