391916248 has 8 divisors (see below), whose sum is σ = 734842980. Its totient is φ = 195958120.

The previous prime is 391916243. The next prime is 391916269. The reversal of 391916248 is 842619193.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391916243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24494758 + ... + 24494773.

Almost surely, 2^391916248 is an apocalyptic number.

It is an amenable number.

391916248 is a deficient number, since it is larger than the sum of its proper divisors (342926732).

391916248 is a wasteful number, since it uses less digits than its factorization.

391916248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48989537 (or 48989533 counting only the distinct ones).

The product of its digits is 93312, while the sum is 43.

The square root of 391916248 is about 19796.8747028414. The cubic root of 391916248 is about 731.8090168344.

The spelling of 391916248 in words is "three hundred ninety-one million, nine hundred sixteen thousand, two hundred forty-eight".