478230391 has 4 divisors (see below), whose sum is σ = 489352072. Its totient is φ = 467108712.

The previous prime is 478230377. The next prime is 478230407. The reversal of 478230391 is 193032874.

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 478230391 - 2⁹ = 478229879 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 478230391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478230331) 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, 5560776 + ... + 5560861.

It is an arithmetic number, because the mean of its divisors is an integer number (122338018).

Almost surely, 2^478230391 is an apocalyptic number.

478230391 is a deficient number, since it is larger than the sum of its proper divisors (11121681).

478230391 is a wasteful number, since it uses less digits than its factorization.

478230391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11121680.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 478230391 is about 21868.4793938673. The cubic root of 478230391 is about 782.0101510098.

The spelling of 478230391 in words is "four hundred seventy-eight million, two hundred thirty thousand, three hundred ninety-one".