648091120 has 40 divisors (see below), whose sum is σ = 1508135616. Its totient is φ = 259008768.

The previous prime is 648091109. The next prime is 648091123. The reversal of 648091120 is 21190846.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648091123) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 110994 + ... + 116686.

Almost surely, 2^648091120 is an apocalyptic number.

It is an amenable number.

648091120 is an abundant number, since it is smaller than the sum of its proper divisors (860044496).

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

648091120 is a wasteful number, since it uses less digits than its factorization.

648091120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7129 (or 7123 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 648091120 is about 25457.6338256327. The cubic root of 648091120 is about 865.3903013269.

The spelling of 648091120 in words is "six hundred forty-eight million, ninety-one thousand, one hundred twenty".