478820911 has 4 divisors (see below), whose sum is σ = 481251672. Its totient is φ = 476390152.

The previous prime is 478820873. The next prime is 478820933. The reversal of 478820911 is 119028874.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 478820911 - 2¹¹ = 478818863 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478823911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1215085 + ... + 1215478.

It is an arithmetic number, because the mean of its divisors is an integer number (120312918).

Almost surely, 2^478820911 is an apocalyptic number.

478820911 is a deficient number, since it is larger than the sum of its proper divisors (2430761).

478820911 is a wasteful number, since it uses less digits than its factorization.

478820911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2430760.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 478820911 is about 21881.9768531090. The cubic root of 478820911 is about 782.3318946011.

The spelling of 478820911 in words is "four hundred seventy-eight million, eight hundred twenty thousand, nine hundred eleven".