391424942 has 8 divisors (see below), whose sum is σ = 587865600. Its totient is φ = 195469744.

The previous prime is 391424899. The next prime is 391424963. The reversal of 391424942 is 249424193.

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 = 391424896 and 391424905.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119342 + ... + 122577.

It is an arithmetic number, because the mean of its divisors is an integer number (73483200).

Almost surely, 2^391424942 is an apocalyptic number.

391424942 is a deficient number, since it is larger than the sum of its proper divisors (196440658).

391424942 is a wasteful number, since it uses less digits than its factorization.

391424942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242730.

The product of its digits is 62208, while the sum is 38.

The square root of 391424942 is about 19784.4621357266. The cubic root of 391424942 is about 731.5030904977.

The spelling of 391424942 in words is "three hundred ninety-one million, four hundred twenty-four thousand, nine hundred forty-two".