648465280 has 32 divisors (see below), whose sum is σ = 1550238840. Its totient is φ = 259385856.

The previous prime is 648465271. The next prime is 648465353. The reversal of 648465280 is 82564846.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

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, 505974 + ... + 507253.

Almost surely, 2^648465280 is an apocalyptic number.

It is an amenable number.

648465280 is an abundant number, since it is smaller than the sum of its proper divisors (901773560).

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

648465280 is a wasteful number, since it uses less digits than its factorization.

648465280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013246 (or 1013234 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 43.

The square root of 648465280 is about 25464.9814451140. The cubic root of 648465280 is about 865.5568067937.

The spelling of 648465280 in words is "six hundred forty-eight million, four hundred sixty-five thousand, two hundred eighty".