649389488 has 80 divisors (see below), whose sum is σ = 1451907072. Its totient is φ = 278592000.

The previous prime is 649389487. The next prime is 649389493. The reversal of 649389488 is 884983946.

649389488 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (649389487) 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, 222245 + ... + 225147.

Almost surely, 2^649389488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649389488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (725953536).

649389488 is an abundant number, since it is smaller than the sum of its proper divisors (802517584).

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

649389488 is a wasteful number, since it uses less digits than its factorization.

649389488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2994 (or 2988 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 59.

The square root of 649389488 is about 25483.1216298161. The cubic root of 649389488 is about 865.9678155825.

The spelling of 649389488 in words is "six hundred forty-nine million, three hundred eighty-nine thousand, four hundred eighty-eight".