478688521 has 8 divisors (see below), whose sum is σ = 486116064. Its totient is φ = 471284640.

The previous prime is 478688519. The next prime is 478688531. The reversal of 478688521 is 125886874.

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

It is a cyclic number.

It is not a de Polignac number, because 478688521 - 2¹ = 478688519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478688531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37266 + ... + 48436.

It is an arithmetic number, because the mean of its divisors is an integer number (60764508).

Almost surely, 2^478688521 is an apocalyptic number.

It is an amenable number.

478688521 is a deficient number, since it is larger than the sum of its proper divisors (7427543).

478688521 is a wasteful number, since it uses less digits than its factorization.

478688521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11831.

The product of its digits is 860160, while the sum is 49.

The square root of 478688521 is about 21878.9515516626. The cubic root of 478688521 is about 782.2597852005.

The spelling of 478688521 in words is "four hundred seventy-eight million, six hundred eighty-eight thousand, five hundred twenty-one".