648709322 has 8 divisors (see below), whose sum is σ = 993767616. Its totient is φ = 317453452.

The previous prime is 648709301. The next prime is 648709337. The reversal of 648709322 is 223907846.

It is a happy number.

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

It is a super-3 number, since 3×648709322³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 648709322.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3450488 + ... + 3450675.

It is an arithmetic number, because the mean of its divisors is an integer number (124220952).

Almost surely, 2^648709322 is an apocalyptic number.

648709322 is a deficient number, since it is larger than the sum of its proper divisors (345058294).

648709322 is a wasteful number, since it uses less digits than its factorization.

648709322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6901212.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 648709322 is about 25469.7727119815. The cubic root of 648709322 is about 865.6653737584.

The spelling of 648709322 in words is "six hundred forty-eight million, seven hundred nine thousand, three hundred twenty-two".