391473984 has 112 divisors (see below), whose sum is σ = 1179210240. Its totient is φ = 113456640.

The previous prime is 391473959. The next prime is 391473991. The reversal of 391473984 is 489374193.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44547 + ... + 52605.

Almost surely, 2^391473984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 391473984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (589605120).

391473984 is an abundant number, since it is smaller than the sum of its proper divisors (787736256).

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

391473984 is a wasteful number, since it uses less digits than its factorization.

391473984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8108 (or 8098 counting only the distinct ones).

The product of its digits is 653184, while the sum is 48.

The square root of 391473984 is about 19785.7015038638. The cubic root of 391473984 is about 731.5336394591.

The spelling of 391473984 in words is "three hundred ninety-one million, four hundred seventy-three thousand, nine hundred eighty-four".