391352 has 32 divisors (see below), whose sum is σ = 816480. Its totient is φ = 174720.

The previous prime is 391351. The next prime is 391367. The reversal of 391352 is 253193.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391351) 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 7 ways as a sum of consecutive naturals, for example, 5477 + ... + 5547.

It is an arithmetic number, because the mean of its divisors is an integer number (25515).

2³⁹¹³⁵² 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 391352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (408240).

391352 is an abundant number, since it is smaller than the sum of its proper divisors (425128).

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

391352 is a wasteful number, since it uses less digits than its factorization.

391352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 139 counting only the distinct ones).

The product of its digits is 810, while the sum is 23.

The square root of 391352 is about 625.5813296447. The cubic root of 391352 is about 73.1457649165.

The spelling of 391352 in words is "three hundred ninety-one thousand, three hundred fifty-two".