649330944 has 72 divisors (see below), whose sum is σ = 1765034880. Its totient is φ = 211826688.

The previous prime is 649330933. The next prime is 649330949. The reversal of 649330944 is 449033946.

It is a super-3 number, since 3×649330944³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 649330896 and 649330905.

It is not an unprimeable number, because it can be changed into a prime (649330949) 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, 27102 + ... + 45090.

Almost surely, 2^649330944 is an apocalyptic number.

649330944 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649330944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (882517440).

649330944 is an abundant number, since it is smaller than the sum of its proper divisors (1115703936).

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

649330944 is a wasteful number, since it uses less digits than its factorization.

649330944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18055 (or 18041 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 42.

The square root of 649330944 is about 25481.9729220482. The cubic root of 649330944 is about 865.9417917841.

The spelling of 649330944 in words is "six hundred forty-nine million, three hundred thirty thousand, nine hundred forty-four".