649673942 has 24 divisors (see below), whose sum is σ = 1000937016. Its totient is φ = 316188576.

The previous prime is 649673929. The next prime is 649673963. The reversal of 649673942 is 249376946.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 1421378 + ... + 1421834.

It is an arithmetic number, because the mean of its divisors is an integer number (41705709).

Almost surely, 2^649673942 is an apocalyptic number.

649673942 is a deficient number, since it is larger than the sum of its proper divisors (351263074).

649673942 is a wasteful number, since it uses less digits than its factorization.

649673942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732 (or 629 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 50.

The square root of 649673942 is about 25488.7022423661. The cubic root of 649673942 is about 866.0942379406.

The spelling of 649673942 in words is "six hundred forty-nine million, six hundred seventy-three thousand, nine hundred forty-two".