648538332 has 48 divisors (see below), whose sum is σ = 1633172352. Its totient is φ = 199120320.

The previous prime is 648538309. The next prime is 648538333. The reversal of 648538332 is 233835846.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648538333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72363 + ... + 80829.

It is an arithmetic number, because the mean of its divisors is an integer number (34024424).

Almost surely, 2^648538332 is an apocalyptic number.

It is an amenable number.

648538332 is an abundant number, since it is smaller than the sum of its proper divisors (984634020).

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

648538332 is a wasteful number, since it uses less digits than its factorization.

648538332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8978 (or 8976 counting only the distinct ones).

The product of its digits is 414720, while the sum is 42.

The square root of 648538332 is about 25466.4157666524. The cubic root of 648538332 is about 865.5893082930.

The spelling of 648538332 in words is "six hundred forty-eight million, five hundred thirty-eight thousand, three hundred thirty-two".