391743142 has 24 divisors (see below), whose sum is σ = 685125864. Its totient is φ = 167503392.

The previous prime is 391743127. The next prime is 391743173. The reversal of 391743142 is 241347193.

It is a junction number, because it is equal to n+sod(n) for n = 391743098 and 391743107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40413 + ... + 49159.

It is an arithmetic number, because the mean of its divisors is an integer number (28546911).

Almost surely, 2^391743142 is an apocalyptic number.

391743142 is a deficient number, since it is larger than the sum of its proper divisors (293382722).

391743142 is a wasteful number, since it uses less digits than its factorization.

391743142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9220 (or 9213 counting only the distinct ones).

The product of its digits is 18144, while the sum is 34.

The square root of 391743142 is about 19792.5021662245. The cubic root of 391743142 is about 731.7012564067.

The spelling of 391743142 in words is "three hundred ninety-one million, seven hundred forty-three thousand, one hundred forty-two".