648389460 has 48 divisors (see below), whose sum is σ = 1817335296. Its totient is φ = 172728192.

The previous prime is 648389447. The next prime is 648389461. The reversal of 648389460 is 64983846.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648389461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60637 + ... + 70523.

It is an arithmetic number, because the mean of its divisors is an integer number (37861152).

Almost surely, 2^648389460 is an apocalyptic number.

648389460 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

648389460 is an abundant number, since it is smaller than the sum of its proper divisors (1168945836).

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

648389460 is a wasteful number, since it uses less digits than its factorization.

648389460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10992 (or 10990 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 48.

The square root of 648389460 is about 25463.4926905168. The cubic root of 648389460 is about 865.5230712044.

The spelling of 648389460 in words is "six hundred forty-eight million, three hundred eighty-nine thousand, four hundred sixty".