391341252 has 48 divisors (see below), whose sum is σ = 964454400. Its totient is φ = 123161760.

The previous prime is 391341217. The next prime is 391341253. The reversal of 391341252 is 252143193.

It is not an unprimeable number, because it can be changed into a prime (391341253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68149 + ... + 73667.

It is an arithmetic number, because the mean of its divisors is an integer number (20092800).

Almost surely, 2^391341252 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 391341252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (482227200).

391341252 is an abundant number, since it is smaller than the sum of its proper divisors (573113148).

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

391341252 is a wasteful number, since it uses less digits than its factorization.

391341252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5856 (or 5854 counting only the distinct ones).

The product of its digits is 6480, while the sum is 30.

The square root of 391341252 is about 19782.3469790619. The cubic root of 391341252 is about 731.4509529095.

The spelling of 391341252 in words is "three hundred ninety-one million, three hundred forty-one thousand, two hundred fifty-two".