646494 has 32 divisors (see below), whose sum is σ = 1399680. Its totient is φ = 198432.

The previous prime is 646453. The next prime is 646519. The reversal of 646494 is 494646.

646494 = T₅₂ + T₅₃ + ... + T₁₅₈.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5989 + ... + 6095.

It is an arithmetic number, because the mean of its divisors is an integer number (43740).

2⁶⁴⁶⁴⁹⁴ is an apocalyptic number.

646494 is an abundant number, since it is smaller than the sum of its proper divisors (753186).

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

646494 is a wasteful number, since it uses less digits than its factorization.

646494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184.

The product of its digits is 20736, while the sum is 33.

The square root of 646494 is about 804.0485059995. The cubic root of 646494 is about 86.4678843209.

The spelling of 646494 in words is "six hundred forty-six thousand, four hundred ninety-four".