646032239 has 8 divisors (see below), whose sum is σ = 649850160. Its totient is φ = 642223296.

The previous prime is 646032227. The next prime is 646032251. The reversal of 646032239 is 932230646.

It is an interprime number because it is at equal distance from previous prime (646032227) and next prime (646032251).

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

It is a cyclic number.

It is not a de Polignac number, because 646032239 - 2⁴ = 646032223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 646032199 and 646032208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646032539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186467 + ... + 189899.

It is an arithmetic number, because the mean of its divisors is an integer number (81231270).

Almost surely, 2^646032239 is an apocalyptic number.

646032239 is a deficient number, since it is larger than the sum of its proper divisors (3817921).

646032239 is a wasteful number, since it uses less digits than its factorization.

646032239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4489.

The product of its (nonzero) digits is 46656, while the sum is 35.

The square root of 646032239 is about 25417.1642596101. The cubic root of 646032239 is about 864.4729273685.

The spelling of 646032239 in words is "six hundred forty-six million, thirty-two thousand, two hundred thirty-nine".