478007389 has 4 divisors (see below), whose sum is σ = 478053756. Its totient is φ = 477961024.

The previous prime is 478007357. The next prime is 478007399. The reversal of 478007389 is 983700874.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 191822500 + 286184889 = 13850^2 + 16917^2 .

It is a cyclic number.

It is not a de Polignac number, because 478007389 - 2⁵ = 478007357 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 (478007399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27 + ... + 30919.

It is an arithmetic number, because the mean of its divisors is an integer number (119513439).

Almost surely, 2^478007389 is an apocalyptic number.

It is an amenable number.

478007389 is a deficient number, since it is larger than the sum of its proper divisors (46367).

478007389 is a wasteful number, since it uses less digits than its factorization.

478007389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46366.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 478007389 is about 21863.3800909192. The cubic root of 478007389 is about 781.8885799397. Note that the first 3 decimals are identical.

The spelling of 478007389 in words is "four hundred seventy-eight million, seven thousand, three hundred eighty-nine".