646948 has 12 divisors (see below), whose sum is σ = 1139292. Its totient is φ = 321440.

The previous prime is 646937. The next prime is 646957. The reversal of 646948 is 849646.

It can be written as a sum of positive squares in 2 ways, for example, as 451584 + 195364 = 672^2 + 442^2 .

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 in 3 ways as a sum of consecutive naturals, for example, 378 + ... + 1198.

It is an arithmetic number, because the mean of its divisors is an integer number (94941).

2⁶⁴⁶⁹⁴⁸ is an apocalyptic number.

It is an amenable number.

646948 is a deficient number, since it is larger than the sum of its proper divisors (492344).

646948 is a wasteful number, since it uses less digits than its factorization.

646948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022 (or 1020 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 646948 is about 804.3307777277. The cubic root of 646948 is about 86.4881202570.

The spelling of 646948 in words is "six hundred forty-six thousand, nine hundred forty-eight".