331648 has 16 divisors (see below), whose sum is σ = 660960. Its totient is φ = 165760.

The previous prime is 331613. The next prime is 331651. The reversal of 331648 is 846133.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1168 + ... + 1423.

It is an arithmetic number, because the mean of its divisors is an integer number (41310).

2³³¹⁶⁴⁸ is an apocalyptic number.

It is an amenable number.

331648 is a deficient number, since it is larger than the sum of its proper divisors (329312).

331648 is an equidigital number, since it uses as much as digits as its factorization.

331648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2605 (or 2593 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 331648 is about 575.8888781701. Note that the first 4 decimals coincide. The cubic root of 331648 is about 69.2190754545.

It can be divided in two parts, 3316 and 48, that added together give a square (3364 = 58²).

The spelling of 331648 in words is "three hundred thirty-one thousand, six hundred forty-eight".