391298 has 8 divisors (see below), whose sum is σ = 593292. Its totient is φ = 193536.

The previous prime is 391291. The next prime is 391301. The reversal of 391298 is 892193.

It can be written as a sum of positive squares in 2 ways, for example, as 380689 + 10609 = 617^2 + 103^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×391298² = 306228249608, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (391291) by changing a digit.

391298 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 815 + ... + 1202.

2³⁹¹²⁹⁸ is an apocalyptic number.

391298 is a deficient number, since it is larger than the sum of its proper divisors (201994).

391298 is a wasteful number, since it uses less digits than its factorization.

391298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116.

The product of its digits is 3888, while the sum is 32.

The square root of 391298 is about 625.5381682999. The cubic root of 391298 is about 73.1424004662.

The spelling of 391298 in words is "three hundred ninety-one thousand, two hundred ninety-eight".