391311422 has 8 divisors (see below), whose sum is σ = 617860200. Its totient is φ = 185358024.

The previous prime is 391311407. The next prime is 391311433. The reversal of 391311422 is 224113193.

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

It is a junction number, because it is equal to n+sod(n) for n = 391311391 and 391311400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5148797 + ... + 5148872.

It is an arithmetic number, because the mean of its divisors is an integer number (77232525).

Almost surely, 2^391311422 is an apocalyptic number.

391311422 is a deficient number, since it is larger than the sum of its proper divisors (226548778).

391311422 is a wasteful number, since it uses less digits than its factorization.

391311422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10297690.

The product of its digits is 1296, while the sum is 26.

The square root of 391311422 is about 19781.5930096643. The cubic root of 391311422 is about 731.4323674795.

The spelling of 391311422 in words is "three hundred ninety-one million, three hundred eleven thousand, four hundred twenty-two".