391048704 has 120 divisors (see below), whose sum is σ = 1140096672. Its totient is φ = 129024000.

The previous prime is 391048661. The next prime is 391048711. The reversal of 391048704 is 407840193.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 520329 + ... + 521079.

Almost surely, 2^391048704 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 391048704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (570048336).

391048704 is an abundant number, since it is smaller than the sum of its proper divisors (749047968).

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

391048704 is a wasteful number, since it uses less digits than its factorization.

391048704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888 (or 869 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 391048704 is about 19774.9514285118. The cubic root of 391048704 is about 731.2686415585.

Adding to 391048704 its reverse (407840193), we get a palindrome (798888897).

The spelling of 391048704 in words is "three hundred ninety-one million, forty-eight thousand, seven hundred four".