391380 has 48 divisors (see below), whose sum is σ = 1197504. Its totient is φ = 94720.

The previous prime is 391379. The next prime is 391387. The reversal of 391380 is 83193.

It is a self number, because there is not a number n which added to its sum of digits gives 391380.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 364 + ... + 956.

It is an arithmetic number, because the mean of its divisors is an integer number (24948).

2³⁹¹³⁸⁰ is an apocalyptic number.

391380 is a gapful number since it is divisible by the number (30) 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 391380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (598752).

391380 is an abundant number, since it is smaller than the sum of its proper divisors (806124).

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

391380 is a wasteful number, since it uses less digits than its factorization.

391380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616 (or 614 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 391380 is about 625.6037084289. The cubic root of 391380 is about 73.1475093244.

It can be divided in two parts, 3913 and 80, that added together give a palindrome (3993).

The spelling of 391380 in words is "three hundred ninety-one thousand, three hundred eighty".