646460 has 12 divisors (see below), whose sum is σ = 1357608. Its totient is φ = 258576.

The previous prime is 646453. The next prime is 646519. The reversal of 646460 is 64646.

646460 = T₂₂₀ + T₂₂₁ + ... + T₂₄₃.

It is a congruent number.

It is an unprimeable number.

646460 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16142 + ... + 16181.

It is an arithmetic number, because the mean of its divisors is an integer number (113134).

2⁶⁴⁶⁴⁶⁰ is an apocalyptic number.

It is an amenable number.

646460 is an abundant number, since it is smaller than the sum of its proper divisors (711148).

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

646460 is a wasteful number, since it uses less digits than its factorization.

646460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32332 (or 32330 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 646460 is about 804.0273627185. The cubic root of 646460 is about 86.4663684731.

The spelling of 646460 in words is "six hundred forty-six thousand, four hundred sixty".