478890081 has 6 divisors (see below), whose sum is σ = 691730130. Its totient is φ = 319260048.

The previous prime is 478890073. The next prime is 478890133. The reversal of 478890081 is 180098874.

It can be written as a sum of positive squares in only one way, i.e., 376981056 + 101909025 = 19416^2 + 10095^2 .

It is not a de Polignac number, because 478890081 - 2³ = 478890073 is a prime.

It is a super-2 number, since 2×478890081² = 458671419360373122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (478890781) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26604996 + ... + 26605013.

It is an arithmetic number, because the mean of its divisors is an integer number (115288355).

Almost surely, 2^478890081 is an apocalyptic number.

It is an amenable number.

478890081 is a deficient number, since it is larger than the sum of its proper divisors (212840049).

478890081 is a wasteful number, since it uses less digits than its factorization.

478890081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53210015 (or 53210012 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 478890081 is about 21883.5573205089. The cubic root of 478890081 is about 782.3695644204.

The spelling of 478890081 in words is "four hundred seventy-eight million, eight hundred ninety thousand, eighty-one".