317647442 has 16 divisors (see below), whose sum is σ = 559256640. Its totient is φ = 132455088.

The previous prime is 317647441. The next prime is 317647471. The reversal of 317647442 is 244746713.

It is a junction number, because it is equal to n+sod(n) for n = 317647396 and 317647405.

It is not an unprimeable number, because it can be changed into a prime (317647441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306092 + ... + 307127.

It is an arithmetic number, because the mean of its divisors is an integer number (34953540).

Almost surely, 2^317647442 is an apocalyptic number.

317647442 is a deficient number, since it is larger than the sum of its proper divisors (241609198).

317647442 is a wasteful number, since it uses less digits than its factorization.

317647442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613265.

The product of its digits is 112896, while the sum is 38.

The square root of 317647442 is about 17822.6665232787. Note that the first 3 decimals coincide. The cubic root of 317647442 is about 682.3100802136.

The spelling of 317647442 in words is "three hundred seventeen million, six hundred forty-seven thousand, four hundred forty-two".