649846320 has 80 divisors (see below), whose sum is σ = 2023343712. Its totient is φ = 172533760.

The previous prime is 649846277. The next prime is 649846321. The reversal of 649846320 is 23648946.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (649846321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50110 + ... + 61730.

Almost surely, 2^649846320 is an apocalyptic number.

649846320 is a gapful number since it is divisible by the number (60) 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 649846320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1011671856).

649846320 is an abundant number, since it is smaller than the sum of its proper divisors (1373497392).

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

649846320 is a wasteful number, since it uses less digits than its factorization.

649846320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11870 (or 11864 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 42.

The square root of 649846320 is about 25492.0834770326. The cubic root of 649846320 is about 866.1708314339.

The spelling of 649846320 in words is "six hundred forty-nine million, eight hundred forty-six thousand, three hundred twenty".