391441248 has 120 divisors (see below), whose sum is σ = 1255965480. Its totient is φ = 118609920.

The previous prime is 391441229. The next prime is 391441273. The reversal of 391441248 is 842144193.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 21648 + ... + 35376.

It is an arithmetic number, because the mean of its divisors is an integer number (10466379).

Almost surely, 2^391441248 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 391441248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (627982740).

391441248 is an abundant number, since it is smaller than the sum of its proper divisors (864524232).

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

391441248 is a wasteful number, since it uses less digits than its factorization.

391441248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13762 (or 13745 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 391441248 is about 19784.8742224963. The cubic root of 391441248 is about 731.5132480208.

The spelling of 391441248 in words is "three hundred ninety-one million, four hundred forty-one thousand, two hundred forty-eight".