648468289 has 8 divisors (see below), whose sum is σ = 744061248. Its totient is φ = 553614000.

The previous prime is 648468269. The next prime is 648468299. The reversal of 648468289 is 982864846.

648468289 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 a de Polignac number, because none of the positive numbers 2^k-648468289 is a prime.

It is a super-2 number, since 2×648468289² = 841022243677175042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (648468229) 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, 182782 + ... + 186295.

It is an arithmetic number, because the mean of its divisors is an integer number (93007656).

Almost surely, 2^648468289 is an apocalyptic number.

It is an amenable number.

648468289 is a deficient number, since it is larger than the sum of its proper divisors (95592959).

648468289 is a wasteful number, since it uses less digits than its factorization.

648468289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369335.

The product of its digits is 5308416, while the sum is 55.

The square root of 648468289 is about 25465.0405261802. The cubic root of 648468289 is about 865.5581455734.

The spelling of 648468289 in words is "six hundred forty-eight million, four hundred sixty-eight thousand, two hundred eighty-nine".