648871000 has 32 divisors (see below), whose sum is σ = 1518360480. Its totient is φ = 259548000.

The previous prime is 648870991. The next prime is 648871001. The reversal of 648871000 is 178846.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648871001) 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, 323436 + ... + 325435.

It is an arithmetic number, because the mean of its divisors is an integer number (47448765).

Almost surely, 2^648871000 is an apocalyptic number.

It is an amenable number.

648871000 is an abundant number, since it is smaller than the sum of its proper divisors (869489480).

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

648871000 is a wasteful number, since it uses less digits than its factorization.

648871000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648892 (or 648878 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 648871000 is about 25472.9464334223. The cubic root of 648871000 is about 865.7372844565.

The spelling of 648871000 in words is "six hundred forty-eight million, eight hundred seventy-one thousand".