478866439 has 4 divisors (see below), whose sum is σ = 482522040. Its totient is φ = 475210840.

The previous prime is 478866433. The next prime is 478866457. The reversal of 478866439 is 934668874.

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 478866439 - 2²¹ = 476769287 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 478866439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478866433) 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, 1827604 + ... + 1827865.

It is an arithmetic number, because the mean of its divisors is an integer number (120630510).

Almost surely, 2^478866439 is an apocalyptic number.

478866439 is a deficient number, since it is larger than the sum of its proper divisors (3655601).

478866439 is a wasteful number, since it uses less digits than its factorization.

478866439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3655600.

The product of its digits is 6967296, while the sum is 55.

The square root of 478866439 is about 21883.0171365833. The cubic root of 478866439 is about 782.3566894508.

The spelling of 478866439 in words is "four hundred seventy-eight million, eight hundred sixty-six thousand, four hundred thirty-nine".