649039824 has 40 divisors (see below), whose sum is σ = 1862985920. Its totient is φ = 216346464.

The previous prime is 649039823. The next prime is 649039847. The reversal of 649039824 is 428930946.

It is a self number, because there is not a number n which added to its sum of digits gives 649039824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649039823) 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 7 ways as a sum of consecutive naturals, for example, 750772 + ... + 751635.

It is an arithmetic number, because the mean of its divisors is an integer number (46574648).

Almost surely, 2^649039824 is an apocalyptic number.

It is an amenable number.

649039824 is an abundant number, since it is smaller than the sum of its proper divisors (1213946096).

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

649039824 is a wasteful number, since it uses less digits than its factorization.

649039824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502424 (or 1502412 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 649039824 is about 25476.2600080938. The cubic root of 649039824 is about 865.8123607852.

The spelling of 649039824 in words is "six hundred forty-nine million, thirty-nine thousand, eight hundred twenty-four".