649937938 has 16 divisors (see below), whose sum is σ = 1050356160. Its totient is φ = 299840976.

The previous prime is 649937917. The next prime is 649937941. The reversal of 649937938 is 839739946.

It is a super-3 number, since 3×649937938³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82203 + ... + 89761.

It is an arithmetic number, because the mean of its divisors is an integer number (65647260).

Almost surely, 2^649937938 is an apocalyptic number.

649937938 is a deficient number, since it is larger than the sum of its proper divisors (400418222).

649937938 is a wasteful number, since it uses less digits than its factorization.

649937938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10881.

The product of its digits is 8817984, while the sum is 58.

The square root of 649937938 is about 25493.8804029516. The cubic root of 649937938 is about 866.2115349602.

The spelling of 649937938 in words is "six hundred forty-nine million, nine hundred thirty-seven thousand, nine hundred thirty-eight".