646270 has 8 divisors (see below), whose sum is σ = 1163304. Its totient is φ = 258504.

The previous prime is 646267. The next prime is 646271. The reversal of 646270 is 72646.

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 (646271) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 32304 + ... + 32323.

It is an arithmetic number, because the mean of its divisors is an integer number (145413).

2⁶⁴⁶²⁷⁰ is an apocalyptic number.

646270 is a deficient number, since it is larger than the sum of its proper divisors (517034).

646270 is a wasteful number, since it uses less digits than its factorization.

646270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64634.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 646270 is about 803.9091988527. The cubic root of 646270 is about 86.4578965801.

The spelling of 646270 in words is "six hundred forty-six thousand, two hundred seventy".