391895484 has 12 divisors (see below), whose sum is σ = 914422824. Its totient is φ = 130631824.

The previous prime is 391895461. The next prime is 391895489. The reversal of 391895484 is 484598193.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391895489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16328967 + ... + 16328990.

It is an arithmetic number, because the mean of its divisors is an integer number (76201902).

Almost surely, 2^391895484 is an apocalyptic number.

It is an amenable number.

391895484 is an abundant number, since it is smaller than the sum of its proper divisors (522527340).

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

391895484 is a wasteful number, since it uses less digits than its factorization.

391895484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32657964 (or 32657962 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 51.

The square root of 391895484 is about 19796.3502696836. The cubic root of 391895484 is about 731.7960926864.

The spelling of 391895484 in words is "three hundred ninety-one million, eight hundred ninety-five thousand, four hundred eighty-four".