648883281 has 8 divisors (see below), whose sum is σ = 865340224. Its totient is φ = 432507600.

The previous prime is 648883273. The next prime is 648883297. The reversal of 648883281 is 182388846.

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

It is not a de Polignac number, because 648883281 - 2³ = 648883273 is a prime.

It is a super-3 number, since 3×648883281³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 648883281.

It is not an unprimeable number, because it can be changed into a prime (648883481) 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, 1740 + ... + 36066.

It is an arithmetic number, because the mean of its divisors is an integer number (108167528).

Almost surely, 2^648883281 is an apocalyptic number.

It is an amenable number.

648883281 is a deficient number, since it is larger than the sum of its proper divisors (216456943).

648883281 is a wasteful number, since it uses less digits than its factorization.

648883281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40631.

The product of its digits is 589824, while the sum is 48.

The square root of 648883281 is about 25473.1874919493. The cubic root of 648883281 is about 865.7427462779.

The spelling of 648883281 in words is "six hundred forty-eight million, eight hundred eighty-three thousand, two hundred eighty-one".