648539406 has 64 divisors (see below), whose sum is σ = 1494835200. Its totient is φ = 208202400.

The previous prime is 648539377. The next prime is 648539447. The reversal of 648539406 is 604935846.

It is a super-3 number, since 3×648539406³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 399276 + ... + 400896.

It is an arithmetic number, because the mean of its divisors is an integer number (23356800).

Almost surely, 2^648539406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648539406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (747417600).

648539406 is an abundant number, since it is smaller than the sum of its proper divisors (846295794).

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

648539406 is a wasteful number, since it uses less digits than its factorization.

648539406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1902 (or 1896 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 648539406 is about 25466.4368532388. The cubic root of 648539406 is about 865.5897861072.

The spelling of 648539406 in words is "six hundred forty-eight million, five hundred thirty-nine thousand, four hundred six".