391377376 has 48 divisors (see below), whose sum is σ = 840369600. Its totient is φ = 178334208.

The previous prime is 391377367. The next prime is 391377377. The reversal of 391377376 is 673773193.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391377377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26910 + ... + 38818.

It is an arithmetic number, because the mean of its divisors is an integer number (17507700).

Almost surely, 2^391377376 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 391377376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (420184800).

391377376 is an abundant number, since it is smaller than the sum of its proper divisors (448992224).

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

391377376 is a wasteful number, since it uses less digits than its factorization.

391377376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12011 (or 12003 counting only the distinct ones).

The product of its digits is 500094, while the sum is 46.

The square root of 391377376 is about 19783.2599942477. The cubic root of 391377376 is about 731.4734585199.

The spelling of 391377376 in words is "three hundred ninety-one million, three hundred seventy-seven thousand, three hundred seventy-six".