646380034 has 8 divisors (see below), whose sum is σ = 985464828. Its totient is φ = 317891760.

The previous prime is 646380023. The next prime is 646380037. The reversal of 646380034 is 430083646.

It can be written as a sum of positive squares in 2 ways, for example, as 388681225 + 257698809 = 19715^2 + 16053^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (646380037) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2648977 + ... + 2649220.

Almost surely, 2^646380034 is an apocalyptic number.

646380034 is a deficient number, since it is larger than the sum of its proper divisors (339084794).

646380034 is a wasteful number, since it uses less digits than its factorization.

646380034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5298260.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 646380034 is about 25424.0050739454. The cubic root of 646380034 is about 864.6280307859.

The spelling of 646380034 in words is "six hundred forty-six million, three hundred eighty thousand, thirty-four".