649331252 has 24 divisors (see below), whose sum is σ = 1206664200. Its totient is φ = 304680960.

The previous prime is 649331231. The next prime is 649331311. The reversal of 649331252 is 252133946.

It can be written as a sum of positive squares in 4 ways, for example, as 279692176 + 369639076 = 16724^2 + 19226^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10052 + ... + 37412.

It is an arithmetic number, because the mean of its divisors is an integer number (50277675).

Almost surely, 2^649331252 is an apocalyptic number.

It is an amenable number.

649331252 is a deficient number, since it is larger than the sum of its proper divisors (557332948).

649331252 is a wasteful number, since it uses less digits than its factorization.

649331252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27731 (or 27729 counting only the distinct ones).

The product of its digits is 38880, while the sum is 35.

The square root of 649331252 is about 25481.9789655356. The cubic root of 649331252 is about 865.9419286994.

The spelling of 649331252 in words is "six hundred forty-nine million, three hundred thirty-one thousand, two hundred fifty-two".