649229788 has 12 divisors (see below), whose sum is σ = 1137634960. Its totient is φ = 324191232.

The previous prime is 649229783. The next prime is 649229797. The reversal of 649229788 is 887922946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649229783) 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 3 ways as a sum of consecutive naturals, for example, 102456 + ... + 108607.

Almost surely, 2^649229788 is an apocalyptic number.

It is an amenable number.

649229788 is a deficient number, since it is larger than the sum of its proper divisors (488405172).

649229788 is a wasteful number, since it uses less digits than its factorization.

649229788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211836 (or 211834 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 55.

The square root of 649229788 is about 25479.9879905780. The cubic root of 649229788 is about 865.8968225442.

The spelling of 649229788 in words is "six hundred forty-nine million, two hundred twenty-nine thousand, seven hundred eighty-eight".