391948 has 6 divisors (see below), whose sum is σ = 685916. Its totient is φ = 195972.

The previous prime is 391939. The next prime is 391961. The reversal of 391948 is 849193.

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 as a sum of consecutive naturals, namely, 48990 + ... + 48997.

2³⁹¹⁹⁴⁸ is an apocalyptic number.

It is an amenable number.

391948 is a deficient number, since it is larger than the sum of its proper divisors (293968).

391948 is a wasteful number, since it uses less digits than its factorization.

391948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97991 (or 97989 counting only the distinct ones).

The product of its digits is 7776, while the sum is 34.

The square root of 391948 is about 626.0575053460. The cubic root of 391948 is about 73.1828779367.

The spelling of 391948 in words is "three hundred ninety-one thousand, nine hundred forty-eight".