391908048 has 40 divisors (see below), whose sum is σ = 1157062848. Its totient is φ = 111973632.

The previous prime is 391908047. The next prime is 391908061. The reversal of 391908048 is 840809193.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391908047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 582861 + ... + 583532.

Almost surely, 2^391908048 is an apocalyptic number.

It is an amenable number.

391908048 is an abundant number, since it is smaller than the sum of its proper divisors (765154800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

391908048 is a wasteful number, since it uses less digits than its factorization.

391908048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166411 (or 1166405 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 391908048 is about 19796.6675983611. The cubic root of 391908048 is about 731.8039129584.

The spelling of 391908048 in words is "three hundred ninety-one million, nine hundred eight thousand, forty-eight".