648209232 has 120 divisors (see below), whose sum is σ = 1988756640. Its totient is φ = 195459840.

The previous prime is 648209231. The next prime is 648209249. The reversal of 648209232 is 232902846.

648209232 is a `hidden beast` number, since 648 + 2 + 0 + 9 + 2 + 3 + 2 = 666.

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 (648209231) 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, 361843 + ... + 363629.

It is an arithmetic number, because the mean of its divisors is an integer number (16572972).

Almost surely, 2^648209232 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 648209232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (994378320).

648209232 is an abundant number, since it is smaller than the sum of its proper divisors (1340547408).

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

648209232 is a wasteful number, since it uses less digits than its factorization.

648209232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041 (or 2032 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 648209232 is about 25459.9534956370. The cubic root of 648209232 is about 865.4428694342.

The spelling of 648209232 in words is "six hundred forty-eight million, two hundred nine thousand, two hundred thirty-two".