649295768 has 16 divisors (see below), whose sum is σ = 1328105160. Its totient is φ = 295134400.

The previous prime is 649295753. The next prime is 649295783. The reversal of 649295768 is 867592946.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (649295753) and next prime (649295783).

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 3 ways as a sum of consecutive naturals, for example, 3689093 + ... + 3689268.

Almost surely, 2^649295768 is an apocalyptic number.

It is an amenable number.

649295768 is an abundant number, since it is smaller than the sum of its proper divisors (678809392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649295768 is a wasteful number, since it uses less digits than its factorization.

649295768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7378378 (or 7378374 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 56.

The square root of 649295768 is about 25481.2826992677. The cubic root of 649295768 is about 865.9261547047.

The spelling of 649295768 in words is "six hundred forty-nine million, two hundred ninety-five thousand, seven hundred sixty-eight".