391480672 has 48 divisors (see below), whose sum is σ = 858719232. Its totient is φ = 174152320.

The previous prime is 391480633. The next prime is 391480673. The reversal of 391480672 is 276084193.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391480673) 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, 4713 + ... + 28375.

It is an arithmetic number, because the mean of its divisors is an integer number (17889984).

Almost surely, 2^391480672 is an apocalyptic number.

391480672 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 391480672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (429359616).

391480672 is an abundant number, since it is smaller than the sum of its proper divisors (467238560).

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

391480672 is a wasteful number, since it uses less digits than its factorization.

391480672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23731 (or 23723 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 391480672 is about 19785.8705140815. The cubic root of 391480672 is about 731.5378053121.

The spelling of 391480672 in words is "three hundred ninety-one million, four hundred eighty thousand, six hundred seventy-two".