494397906 has 8 divisors (see below), whose sum is σ = 988795824. Its totient is φ = 164799300.

The previous prime is 494397901. The next prime is 494397907. The reversal of 494397906 is 609793494.

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

494397906 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (494397901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41199820 + ... + 41199831.

It is an arithmetic number, because the mean of its divisors is an integer number (123599478).

Almost surely, 2^494397906 is an apocalyptic number.

494397906 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

494397906 is a wasteful number, since it uses less digits than its factorization.

494397906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82399656.

The product of its (nonzero) digits is 1469664, while the sum is 51.

The square root of 494397906 is about 22235.0602877528. The cubic root of 494397906 is about 790.7251292225.

The spelling of 494397906 in words is "four hundred ninety-four million, three hundred ninety-seven thousand, nine hundred six".