291448 has 16 divisors (see below), whose sum is σ = 578880. Its totient is φ = 137088.

The previous prime is 291443. The next prime is 291457. The reversal of 291448 is 844192.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (291443) by changing a digit.

291448 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, 936 + ... + 1207.

It is an arithmetic number, because the mean of its divisors is an integer number (36180).

2²⁹¹⁴⁴⁸ is an apocalyptic number.

It is an amenable number.

291448 is a deficient number, since it is larger than the sum of its proper divisors (287432).

291448 is a wasteful number, since it uses less digits than its factorization.

291448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2166 (or 2162 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 291448 is about 539.8592409138. The cubic root of 291448 is about 66.3010428991.

The spelling of 291448 in words is "two hundred ninety-one thousand, four hundred forty-eight".