478265309 has 4 divisors (see below), whose sum is σ = 481199616. Its totient is φ = 475331004.

The previous prime is 478265299. The next prime is 478265317. The reversal of 478265309 is 903562874.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 478265309 - 2¹² = 478261213 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 478265309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478265399) 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, 1466909 + ... + 1467234.

It is an arithmetic number, because the mean of its divisors is an integer number (120299904).

Almost surely, 2^478265309 is an apocalyptic number.

It is an amenable number.

478265309 is a deficient number, since it is larger than the sum of its proper divisors (2934307).

478265309 is a wasteful number, since it uses less digits than its factorization.

478265309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2934306.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 478265309 is about 21869.2777429891. The cubic root of 478265309 is about 782.0291833746.

It can be divided in two parts, 47826 and 5309, that added together give a palindrome (53135).

The spelling of 478265309 in words is "four hundred seventy-eight million, two hundred sixty-five thousand, three hundred nine".