648905389 has 8 divisors (see below), whose sum is σ = 724360032. Its totient is φ = 576194640.

The previous prime is 648905381. The next prime is 648905393. The reversal of 648905389 is 983509846.

It is a happy number.

648905389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 648905389 - 2³ = 648905381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648905381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 685474 + ... + 686419.

It is an arithmetic number, because the mean of its divisors is an integer number (90545004).

Almost surely, 2^648905389 is an apocalyptic number.

It is an amenable number.

648905389 is a deficient number, since it is larger than the sum of its proper divisors (75454643).

648905389 is a wasteful number, since it uses less digits than its factorization.

648905389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371947.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The square root of 648905389 is about 25473.6214347313. The cubic root of 648905389 is about 865.7525783611.

The spelling of 648905389 in words is "six hundred forty-eight million, nine hundred five thousand, three hundred eighty-nine".