646084 has 6 divisors (see below), whose sum is σ = 1130654. Its totient is φ = 323040.

The previous prime is 646073. The next prime is 646099. The reversal of 646084 is 480646.

It can be written as a sum of positive squares in only one way, i.e., 640000 + 6084 = 800^2 + 78^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80757 + ... + 80764.

2⁶⁴⁶⁰⁸⁴ is an apocalyptic number.

It is an amenable number.

646084 is a deficient number, since it is larger than the sum of its proper divisors (484570).

646084 is a wasteful number, since it uses less digits than its factorization.

646084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161525 (or 161523 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 646084 is about 803.7935058210. The cubic root of 646084 is about 86.4496014342.

It can be divided in two parts, 64 and 6084, that multiplied together give a square (389376 = 624²).

The spelling of 646084 in words is "six hundred forty-six thousand, eighty-four".