649158938 has 4 divisors (see below), whose sum is σ = 973738410. Its totient is φ = 324579468.

The previous prime is 649158929. The next prime is 649158943. The reversal of 649158938 is 839851946.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 374693449 + 274465489 = 19357^2 + 16567^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 649158938.

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 as a sum of consecutive naturals, namely, 162289733 + ... + 162289736.

Almost surely, 2^649158938 is an apocalyptic number.

649158938 is a deficient number, since it is larger than the sum of its proper divisors (324579472).

649158938 is a wasteful number, since it uses less digits than its factorization.

649158938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324579471.

The product of its digits is 1866240, while the sum is 53.

The square root of 649158938 is about 25478.5976458674. The cubic root of 649158938 is about 865.8653231569.

The spelling of 649158938 in words is "six hundred forty-nine million, one hundred fifty-eight thousand, nine hundred thirty-eight".