648248944 has 40 divisors (see below), whose sum is σ = 1451558880. Its totient is φ = 274695168.

The previous prime is 648248933. The next prime is 648248959. The reversal of 648248944 is 449842846.

It is a happy number.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22549 + ... + 42484.

It is an arithmetic number, because the mean of its divisors is an integer number (36288972).

Almost surely, 2^648248944 is an apocalyptic number.

It is an amenable number.

648248944 is an abundant number, since it is smaller than the sum of its proper divisors (803309936).

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

648248944 is a wasteful number, since it uses less digits than its factorization.

648248944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65137 (or 65131 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 49.

The square root of 648248944 is about 25460.7333751406. The cubic root of 648248944 is about 865.4605426194.

The spelling of 648248944 in words is "six hundred forty-eight million, two hundred forty-eight thousand, nine hundred forty-four".