494689128 has 32 divisors (see below), whose sum is σ = 1237952160. Its totient is φ = 164732480.

The previous prime is 494689087. The next prime is 494689177. The reversal of 494689128 is 821986494.

It is a super-2 number, since 2×494689128² = 489434666722800768, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 15751 + ... + 35177.

It is an arithmetic number, because the mean of its divisors is an integer number (38686005).

Almost surely, 2^494689128 is an apocalyptic number.

It is an amenable number.

494689128 is an abundant number, since it is smaller than the sum of its proper divisors (743263032).

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

494689128 is a wasteful number, since it uses less digits than its factorization.

494689128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20497 (or 20493 counting only the distinct ones).

The product of its digits is 995328, while the sum is 51.

The square root of 494689128 is about 22241.6080353917. The cubic root of 494689128 is about 790.8803559817.

The spelling of 494689128 in words is "four hundred ninety-four million, six hundred eighty-nine thousand, one hundred twenty-eight".