649099242 has 48 divisors (see below), whose sum is σ = 1614993120. Its totient is φ = 186343200.

The previous prime is 649099229. The next prime is 649099273. The reversal of 649099242 is 242990946.

It is a happy number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 82509 + ... + 90032.

It is an arithmetic number, because the mean of its divisors is an integer number (33645690).

Almost surely, 2^649099242 is an apocalyptic number.

649099242 is an abundant number, since it is smaller than the sum of its proper divisors (965893878).

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

649099242 is a wasteful number, since it uses less digits than its factorization.

649099242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172579 (or 172576 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 649099242 is about 25477.4261258864. The cubic root of 649099242 is about 865.8387809765.

The spelling of 649099242 in words is "six hundred forty-nine million, ninety-nine thousand, two hundred forty-two".