478608881 has 4 divisors (see below), whose sum is σ = 479238564. Its totient is φ = 477979200.

The previous prime is 478608857. The next prime is 478608887. The reversal of 478608881 is 188806874.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 188806874 = 2 ⋅94403437.

It can be written as a sum of positive squares in 2 ways, for example, as 203347600 + 275261281 = 14260^2 + 16591^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478608881 is a prime.

It is a super-2 number, since 2×478608881² = 458132921944144322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478608887) 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, 313700 + ... + 315221.

It is an arithmetic number, because the mean of its divisors is an integer number (119809641).

Almost surely, 2^478608881 is an apocalyptic number.

It is an amenable number.

478608881 is a deficient number, since it is larger than the sum of its proper divisors (629683).

478608881 is an equidigital number, since it uses as much as digits as its factorization.

478608881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629682.

The product of its (nonzero) digits is 688128, while the sum is 50.

The square root of 478608881 is about 21877.1314618713. The cubic root of 478608881 is about 782.2164009525.

The spelling of 478608881 in words is "four hundred seventy-eight million, six hundred eight thousand, eight hundred eighty-one".