478259909 has 18 divisors (see below), whose sum is σ = 515158470. Its totient is φ = 443461200.

The previous prime is 478259879. The next prime is 478259927. The reversal of 478259909 is 909952874.

It can be written as a sum of positive squares in only one way, i.e., 412293025 + 65966884 = 20305^2 + 8122^2 .

It is not a de Polignac number, because 478259909 - 2⁸ = 478259653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478259939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3650774 + ... + 3650904.

It is an arithmetic number, because the mean of its divisors is an integer number (28619915).

Almost surely, 2^478259909 is an apocalyptic number.

It is an amenable number.

478259909 is a deficient number, since it is larger than the sum of its proper divisors (36898561).

478259909 is an equidigital number, since it uses as much as digits as its factorization.

478259909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 53.

The square root of 478259909 is about 21869.1542817732. The cubic root of 478259909 is about 782.0262401174.

The spelling of 478259909 in words is "four hundred seventy-eight million, two hundred fifty-nine thousand, nine hundred nine".