649151938 has 16 divisors (see below), whose sum is σ = 994256640. Its totient is φ = 317804256.

The previous prime is 649151917. The next prime is 649151941. The reversal of 649151938 is 839151946.

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, 631 + ... + 36037.

It is an arithmetic number, because the mean of its divisors is an integer number (62141040).

Almost surely, 2^649151938 is an apocalyptic number.

649151938 is a deficient number, since it is larger than the sum of its proper divisors (345104702).

649151938 is a wasteful number, since it uses less digits than its factorization.

649151938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35601.

The product of its digits is 233280, while the sum is 46.

The square root of 649151938 is about 25478.4602752992. The cubic root of 649151938 is about 865.8622108841.

The spelling of 649151938 in words is "six hundred forty-nine million, one hundred fifty-one thousand, nine hundred thirty-eight".