478236013 has 16 divisors (see below), whose sum is σ = 516423600. Its totient is φ = 441925120.

The previous prime is 478235999. The next prime is 478236019. The reversal of 478236013 is 310632874.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 106440489 + 371795524 = 10317^2 + 19282^2 .

It is a cyclic number.

It is not a de Polignac number, because 478236013 - 2¹³ = 478227821 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 478236013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478236019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59223 + ... + 66811.

It is an arithmetic number, because the mean of its divisors is an integer number (32276475).

Almost surely, 2^478236013 is an apocalyptic number.

It is an amenable number.

478236013 is a deficient number, since it is larger than the sum of its proper divisors (38187587).

478236013 is a wasteful number, since it uses less digits than its factorization.

478236013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7712.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 478236013 is about 21868.6079346629. The cubic root of 478236013 is about 782.0132153932.

Adding to 478236013 its reverse (310632874), we get a palindrome (788868887).

The spelling of 478236013 in words is "four hundred seventy-eight million, two hundred thirty-six thousand, thirteen".