646432246 has 8 divisors (see below), whose sum is σ = 975597624. Its totient is φ = 321233040.

The previous prime is 646432229. The next prime is 646432247. The reversal of 646432246 is 642234646.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646432247) by changing a digit.

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, 991135 + ... + 991786.

It is an arithmetic number, because the mean of its divisors is an integer number (121949703).

Almost surely, 2^646432246 is an apocalyptic number.

646432246 is a deficient number, since it is larger than the sum of its proper divisors (329165378).

646432246 is a wasteful number, since it uses less digits than its factorization.

646432246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1983086.

The product of its digits is 165888, while the sum is 37.

The square root of 646432246 is about 25425.0318780528. The cubic root of 646432246 is about 864.6513105599.

The spelling of 646432246 in words is "six hundred forty-six million, four hundred thirty-two thousand, two hundred forty-six".